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  <xs:element id="bxmt_FinancingReceivableWeightedAverageIndexRateFloor" abstract="false" name="FinancingReceivableWeightedAverageIndexRateFloor" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_FinancingReceivableWeightedAverageIndexRateFloorExcludingZeroPercentInterestRateFloors" abstract="false" name="FinancingReceivableWeightedAverageIndexRateFloorExcludingZeroPercentInterestRateFloors" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcessRollForward" abstract="true" name="FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcessRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_FinancingReceivableSaleAndCollectionOfFinanceReceivablesAndCostRecoveryProceeds" abstract="false" name="FinancingReceivableSaleAndCollectionOfFinanceReceivablesAndCostRecoveryProceeds" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcessWriteoff" abstract="false" name="FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcessWriteoff" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossTransferToOtherAssets" abstract="false" name="FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossTransferToOtherAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableGainLossOnForeignCurrencyTranslation" abstract="false" name="FinancingReceivableGainLossOnForeignCurrencyTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableUnamortizedLoanFeeCostAndPurchasePremiumDiscountRollForward" abstract="true" name="FinancingReceivableUnamortizedLoanFeeCostAndPurchasePremiumDiscountRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_FinancingReceivableUnamortizedLoanFeeCostAndPurchasePremiumDiscountSaleAndCollectionOfFinanceReceivablesAndCostRecoveryProceeds" abstract="false" name="FinancingReceivableUnamortizedLoanFeeCostAndPurchasePremiumDiscountSaleAndCollectionOfFinanceReceivablesAndCostRecoveryProceeds" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableUnamortizedLoanFeeCostAndPurchasePremiumDiscountWriteoff" abstract="false" name="FinancingReceivableUnamortizedLoanFeeCostAndPurchasePremiumDiscountWriteoff" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableUnamortizedLoanFeeCostAndPurchasePremiumDiscountUnrealizedGainLossOnForeignCurrencyTranslation" abstract="false" name="FinancingReceivableUnamortizedLoanFeeCostAndPurchasePremiumDiscountUnrealizedGainLossOnForeignCurrencyTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableDeferredFeesAndOtherItemsIncreaseDecrease" abstract="false" name="FinancingReceivableDeferredFeesAndOtherItemsIncreaseDecrease" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossRollForward" abstract="true" name="FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_FinancingReceivableBeforeAllowanceForCreditLossFeeAndLoanInProcessSaleAndCollectionOfFinanceReceivablesAndCostRecoveryProceeds" abstract="false" name="FinancingReceivableBeforeAllowanceForCreditLossFeeAndLoanInProcessSaleAndCollectionOfFinanceReceivablesAndCostRecoveryProceeds" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossWriteoff" abstract="false" name="FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossWriteoff" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossUnrealizedGainLossOnForeignCurrencyTranslation" abstract="false" name="FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossUnrealizedGainLossOnForeignCurrencyTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_NonrecoverableNoteReceivableMember" abstract="true" name="NonrecoverableNoteReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_IndustrialMember" abstract="true" name="IndustrialMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_SelfStorageMember" abstract="true" name="SelfStorageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_LifeSciencesStudioMember" abstract="true" name="LifeSciencesStudioMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_UnitedStatesSunbeltMember" abstract="true" name="UnitedStatesSunbeltMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_UnitedStatesWestMember" abstract="true" name="UnitedStatesWestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_UnitedStatesNortheastMember" abstract="true" name="UnitedStatesNortheastMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_UnitedStatesMidwestMember" abstract="true" name="UnitedStatesMidwestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_UnitedStatesNorthwestMember" abstract="true" name="UnitedStatesNorthwestMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_OtherEuropeMember" abstract="true" name="OtherEuropeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_OtherInternationalMember" abstract="true" name="OtherInternationalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_LoanExposureRiskMember" abstract="true" name="LoanExposureRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_FinancingReceivablesMember" abstract="true" name="FinancingReceivablesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_LoanParticipationsSoldAxis" abstract="true" name="LoanParticipationsSoldAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_LoanParticipationsSoldDomain" abstract="true" name="LoanParticipationsSoldDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_JuniorLoanParticipationMember" abstract="true" name="JuniorLoanParticipationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_FinancingReceivableExcludingAccruedInterestNetLoansExposureAmount" abstract="false" name="FinancingReceivableExcludingAccruedInterestNetLoansExposureAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableExcludingAccruedInterestUnamortizedLoanFeeCostAndPurchasePremiumDiscountSaleAndCollectionOfFinanceReceivablesAndCostRecoveryProceedsNet" abstract="false" name="FinancingReceivableExcludingAccruedInterestUnamortizedLoanFeeCostAndPurchasePremiumDiscountSaleAndCollectionOfFinanceReceivablesAndCostRecoveryProceedsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_LoanParticipationLiabilitiesPrincipalAmount" abstract="false" name="LoanParticipationLiabilitiesPrincipalAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_RiskRatingOneMember" abstract="true" name="RiskRatingOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_RiskRatingTwoMember" abstract="true" name="RiskRatingTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_RiskRatingThreeMember" abstract="true" name="RiskRatingThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_RiskRatingFourMember" abstract="true" name="RiskRatingFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_RiskRatingFiveMember" abstract="true" name="RiskRatingFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ImpairedLoansMember" abstract="true" name="ImpairedLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ImpairedLoans8LoansMember" abstract="true" name="ImpairedLoans8LoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ImpairedSubordinateLoansMember" abstract="true" name="ImpairedSubordinateLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_AssetSpecificCECLReservesMember" abstract="true" name="AssetSpecificCECLReservesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_GeneralCECLReservesMember" abstract="true" name="GeneralCECLReservesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_NumberOfLoansAxis" abstract="true" name="NumberOfLoansAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_NumberOfLoansDomain" abstract="true" name="NumberOfLoansDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A12LoansMember" abstract="true" name="A12LoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_PerformingLoanInTechnicalDefaultMember" abstract="true" name="PerformingLoanInTechnicalDefaultMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_MixedUseAssetMember" abstract="true" name="MixedUseAssetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ExtendedMaturityLoanTwoMember" abstract="true" name="ExtendedMaturityLoanTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ExtendedMaturityLoanFourMember" abstract="true" name="ExtendedMaturityLoanFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ExtendedMaturityLoanFiveMember" abstract="true" name="ExtendedMaturityLoanFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ExtendedMaturityLoanSixMember" abstract="true" name="ExtendedMaturityLoanSixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ExtendedMaturitySeniorLoansMember" abstract="true" name="ExtendedMaturitySeniorLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_FinancingReceivableWeightedAverageRiskRating" abstract="false" name="FinancingReceivableWeightedAverageRiskRating" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bxmt_FinancingReceivableExcludingAccruedInterestPeriodIncreaseDecreaseAndWriteoffNet" abstract="false" name="FinancingReceivableExcludingAccruedInterestPeriodIncreaseDecreaseAndWriteoffNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableNumberOfLoansImpaired" abstract="false" name="FinancingReceivableNumberOfLoansImpaired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_FinancingReceivableModifiedNumberOfContracts" abstract="false" name="FinancingReceivableModifiedNumberOfContracts" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_FinancingReceivableModifiedOffBalanceSheetLiability" abstract="false" name="FinancingReceivableModifiedOffBalanceSheetLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableModifiedInterestRateIncreaseDecreaseFromModification" abstract="false" name="FinancingReceivableModifiedInterestRateIncreaseDecreaseFromModification" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_USLoansMember" abstract="true" name="USLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_NonUSLoansMember" abstract="true" name="NonUSLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_UniqueLoansMember" abstract="true" name="UniqueLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A7RealEstateOwnedAssetsMember" abstract="true" name="A7RealEstateOwnedAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_RealEstateOwnedConsiderationTransferred" abstract="false" name="RealEstateOwnedConsiderationTransferred" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_LandAndSiteImprovementsAcquiredThroughForeclosurePurchasePriceAllocation" abstract="false" name="LandAndSiteImprovementsAcquiredThroughForeclosurePurchasePriceAllocation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_BuildingAndBuildingImprovementsAcquiredThroughForeclosurePurchasePriceAllocation" abstract="false" name="BuildingAndBuildingImprovementsAcquiredThroughForeclosurePurchasePriceAllocation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_IntangibleRealEstateAcquiredThroughForeclosureGrossPurchasePriceAllocation" abstract="false" name="IntangibleRealEstateAcquiredThroughForeclosureGrossPurchasePriceAllocation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_OtherAssetsAcquiredThroughForeclosurePurchasePriceAllocation" abstract="false" name="OtherAssetsAcquiredThroughForeclosurePurchasePriceAllocation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_ChicagoILMember" abstract="true" name="ChicagoILMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_AtlantaGAMember" abstract="true" name="AtlantaGAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_NewYorkNYMember" abstract="true" name="NewYorkNYMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_DenverCOMember" abstract="true" name="DenverCOMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A5RealEstateOwnedAssetMember" abstract="true" name="A5RealEstateOwnedAssetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_RealEstateAcquiredThroughForeclosureGross" abstract="false" name="RealEstateAcquiredThroughForeclosureGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_BuildingAndBuildingImprovementsAcquiredThroughForeclosure" abstract="false" name="BuildingAndBuildingImprovementsAcquiredThroughForeclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_LandAndSiteImprovementsAcquiredThroughForeclosure" abstract="false" name="LandAndSiteImprovementsAcquiredThroughForeclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_RealEstateAcquiredThroughForeclosureAccumulatedDepreciation" abstract="false" name="RealEstateAcquiredThroughForeclosureAccumulatedDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_IntangibleRealEstateAcquiredThroughForeclosureGross" abstract="false" name="IntangibleRealEstateAcquiredThroughForeclosureGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_IntangibleRealEstateAcquiredThroughForeclosureAccumulatedDepreciation" abstract="false" name="IntangibleRealEstateAcquiredThroughForeclosureAccumulatedDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_IntangibleRealEstateAcquiredThroughForeclosureNet" abstract="false" name="IntangibleRealEstateAcquiredThroughForeclosureNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_IntangibleRealEstateLiabilitiesAcquiredThroughForeclosureGross" abstract="false" name="IntangibleRealEstateLiabilitiesAcquiredThroughForeclosureGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_IntangibleRealEstateLiabilitiesAcquiredThroughForeclosureAccumulatedDepreciation" abstract="false" name="IntangibleRealEstateLiabilitiesAcquiredThroughForeclosureAccumulatedDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_IntangibleRealEstateLiabilitiesAcquiredThroughForeclosureNet" abstract="false" name="IntangibleRealEstateLiabilitiesAcquiredThroughForeclosureNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_RealEstateOwnedHospitalityIncome" abstract="false" name="RealEstateOwnedHospitalityIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_RealEstateOwnedOtherIncome" abstract="false" name="RealEstateOwnedOtherIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_RealEstateOwnedOperatingExpenses" abstract="false" name="RealEstateOwnedOperatingExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_RealEstateOwnedDepreciationAndAmortizationExpense" abstract="false" name="RealEstateOwnedDepreciationAndAmortizationExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_RealEstateOwnedIncomeLoss" abstract="false" name="RealEstateOwnedIncomeLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_EquityMethodInvestmentsCarriedAtHistoricalCostMember" abstract="true" name="EquityMethodInvestmentsCarriedAtHistoricalCostMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_EquityMethodInvestmentsCarriedAtFairValueMember" abstract="true" name="EquityMethodInvestmentsCarriedAtFairValueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_BankLoanPortfolioJointVenture1Member" abstract="true" name="BankLoanPortfolioJointVenture1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_BankLoanPortfolioJointVenture2Member" abstract="true" name="BankLoanPortfolioJointVenture2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_EquityMethodInvestmentsNumberOfProperties" abstract="false" name="EquityMethodInvestmentsNumberOfProperties" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_InvestmentsInUnconsolidatedEntitiesRollForward" abstract="true" name="InvestmentsInUnconsolidatedEntitiesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_EquityMethodInvestmentsContribution" abstract="false" name="EquityMethodInvestmentsContribution" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_AccountsReceivableNetCurrentAndOtherAssetsCurrent" abstract="false" name="AccountsReceivableNetCurrentAndOtherAssetsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_LoanPortfolioPaymentsHeldByOurThirdPartyLoanServicer" abstract="false" name="LoanPortfolioPaymentsHeldByOurThirdPartyLoanServicer" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_CashCollateralForCollateralizedLoanObligations" abstract="false" name="CashCollateralForCollateralizedLoanObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_OtherRealEstateLiabilities" abstract="false" name="OtherRealEstateLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_SecuredDebtRepaymentsPendingServicerRemittance" abstract="false" name="SecuredDebtRepaymentsPendingServicerRemittance" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_SecuredCreditFacilityMember" abstract="true" name="SecuredCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_DebtInstrumentNumberOfLenders" abstract="false" name="DebtInstrumentNumberOfLenders" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_DebtInstrumentCovenantEarningsBeforeInterestTaxesDepreciationAndAmortizationOrEBITDAToFixedChargesMinimum" abstract="false" name="DebtInstrumentCovenantEarningsBeforeInterestTaxesDepreciationAndAmortizationOrEBITDAToFixedChargesMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bxmt_DebtInstrumentCovenantTangibleNetWorthMinimum" abstract="false" name="DebtInstrumentCovenantTangibleNetWorthMinimum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_DebtInstrumentCovenantPercentageOfNetCashProceedsOfFutureEquityIssuances" abstract="false" name="DebtInstrumentCovenantPercentageOfNetCashProceedsOfFutureEquityIssuances" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bxmt_DebtInstrumentCovenantCashLiquidityMinimum" abstract="false" name="DebtInstrumentCovenantCashLiquidityMinimum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_DebtInstrumentCovenantRecourseIndebtednessMaximum" abstract="false" name="DebtInstrumentCovenantRecourseIndebtednessMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bxmt_DebtInstrumentCovenantIndebtednessMaximum" abstract="false" name="DebtInstrumentCovenantIndebtednessMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bxmt_ScheduleOfSecuredCreditFacilitiesTable" abstract="true" name="ScheduleOfSecuredCreditFacilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_SecuredCreditFacilityAdditionalLenderFundingMember" abstract="true" name="SecuredCreditFacilityAdditionalLenderFundingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ScheduleOfSecuredCreditFacilitiesLineItems" abstract="true" name="ScheduleOfSecuredCreditFacilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_DebtInstrumentNumberOfLoans" abstract="false" name="DebtInstrumentNumberOfLoans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_LineOfCreditFacilityRecourseLimitationPercent" abstract="false" name="LineOfCreditFacilityRecourseLimitationPercent" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_DebtInstrumentNumberOfAdditionalLenders" abstract="false" name="DebtInstrumentNumberOfAdditionalLenders" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_ScheduleOfAllInCostOfSecuredCreditFacilitiesTable" abstract="true" name="ScheduleOfAllInCostOfSecuredCreditFacilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_VariableRateSpreadAxis" abstract="true" name="VariableRateSpreadAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_VariableRateSpreadDomain" abstract="true" name="VariableRateSpreadDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A1.50OrLessMember" abstract="true" name="A1.50OrLessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A1.51To1.75Member" abstract="true" name="A1.51To1.75Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A1.76To2.00Member" abstract="true" name="A1.76To2.00Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A2.01OrMoreMember" abstract="true" name="A2.01OrMoreMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ScheduleOfAllInCostOfSecuredCreditFacilitiesLineItems" abstract="true" name="ScheduleOfAllInCostOfSecuredCreditFacilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_LineOfCreditFacilityWeightedAverageAllInCost" abstract="false" name="LineOfCreditFacilityWeightedAverageAllInCost" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_DebtInstrumentWeightedAverageAllInYield" abstract="false" name="DebtInstrumentWeightedAverageAllInYield" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_A2025FL5SeniorCollateralizedLoanObligationMember" abstract="true" name="A2025FL5SeniorCollateralizedLoanObligationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A2025FL5UnderlyingCollateralAssetsMember" abstract="true" name="A2025FL5UnderlyingCollateralAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A2021FL4SeniorCollateralizedLoanObligationMember" abstract="true" name="A2021FL4SeniorCollateralizedLoanObligationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A2021FL4UnderlyingCollateralAssetsMember" abstract="true" name="A2021FL4UnderlyingCollateralAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A2020FL3SeniorCollateralizedLoanObligationMember" abstract="true" name="A2020FL3SeniorCollateralizedLoanObligationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A2020FL3UnderlyingCollateralAssetsMember" abstract="true" name="A2020FL3UnderlyingCollateralAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A2020FL2SeniorCollateralizedLoanObligationMember" abstract="true" name="A2020FL2SeniorCollateralizedLoanObligationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_A2020FL2UnderlyingCollateralAssetsMember" abstract="true" name="A2020FL2UnderlyingCollateralAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_EuropeanLoanSecuritizationMember" abstract="true" name="EuropeanLoanSecuritizationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_LongTermDebtNumberOfLoans" abstract="false" name="LongTermDebtNumberOfLoans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_DebtInstrumentCollateralAmountNumberOfLoans" abstract="false" name="DebtInstrumentCollateralAmountNumberOfLoans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_DebtInstrumentCollateralAmountFaceAmount" abstract="false" name="DebtInstrumentCollateralAmountFaceAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_DebtSecuritizedObligationWeightedAverageCostOverVariableRate" abstract="false" name="DebtSecuritizedObligationWeightedAverageCostOverVariableRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_SecuritizedDebtObligationsYieldRate" abstract="false" name="SecuritizedDebtObligationsYieldRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_DebtAssetSpecificWeightedAverageCostOverVariableRate" abstract="false" name="DebtAssetSpecificWeightedAverageCostOverVariableRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_DebtAssetSpecificUnderlyingAssetsWeightedAverageYieldOverVariableRate" abstract="false" name="DebtAssetSpecificUnderlyingAssetsWeightedAverageYieldOverVariableRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_LoanParticipationsSoldTable" abstract="true" name="LoanParticipationsSoldTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_TotalJuniorLoanParticipationMember" abstract="true" name="TotalJuniorLoanParticipationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_LoanParticipationsSoldMember" abstract="true" name="LoanParticipationsSoldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_LoanParticipationsSoldLineItems" abstract="true" name="LoanParticipationsSoldLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_NumberOfLoanParticipationsSold" abstract="false" name="NumberOfLoanParticipationsSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_LoanParticipationsSoldTotalLoan" abstract="false" name="LoanParticipationsSoldTotalLoan" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_LoanParticipationsSoldLiabilitiesAmount" abstract="false" name="LoanParticipationsSoldLiabilitiesAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_LoanParticipationsSoldTotalLoanAmount" abstract="false" name="LoanParticipationsSoldTotalLoanAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_ParticipationsSoldLoanYield" abstract="false" name="ParticipationsSoldLoanYield" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_B6TermLoanDue2030Member" abstract="true" name="B6TermLoanDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_B7TermLoanDue2029Member" abstract="true" name="B7TermLoanDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_B8TermLoanDue2032Member" abstract="true" name="B8TermLoanDue2032Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_B4TermLoanDue2029Member" abstract="true" name="B4TermLoanDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_B4TermLoanDue2029RepaidWithB6TermLoanProceedsMember" abstract="true" name="B4TermLoanDue2029RepaidWithB6TermLoanProceedsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_B4TermLoanDue2029RepaidWithB7TermLoanProceedsMember" abstract="true" name="B4TermLoanDue2029RepaidWithB7TermLoanProceedsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_B5TermLoanDue2028Member" abstract="true" name="B5TermLoanDue2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_B1TermLoanDue2026Member" abstract="true" name="B1TermLoanDue2026Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_B9TermLoanDue2030Member" abstract="true" name="B9TermLoanDue2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_SeniorSecuredNotesDue2027Member" abstract="true" name="SeniorSecuredNotesDue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_DebtInstrumentAmortizationPercentage" abstract="false" name="DebtInstrumentAmortizationPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_DebtInstrumentRepurchaseWeightedAveragePricePercentage" abstract="false" name="DebtInstrumentRepurchaseWeightedAveragePricePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_DebtInstrumentCovenantTotalDebtToTotalAssetsMaximum" abstract="false" name="DebtInstrumentCovenantTotalDebtToTotalAssetsMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bxmt_SecuredOvernightFinancingRateSOFRAllInCostMember" abstract="true" name="SecuredOvernightFinancingRateSOFRAllInCostMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_DebtInstrumentVariableRateFloor" abstract="false" name="DebtInstrumentVariableRateFloor" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_SeniorSecuredNotesDue2029Member" abstract="true" name="SeniorSecuredNotesDue2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_DebtInstrumentCovenantTotalUnencumberedAssetsToTotalUnsecuredDebtRatioMinimum" abstract="false" name="DebtInstrumentCovenantTotalUnencumberedAssetsToTotalUnsecuredDebtRatioMinimum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bxmt_ConvertibleSeniorNotesDue2027Member" abstract="true" name="ConvertibleSeniorNotesDue2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_DebtInstrumentInterestRateStatedPercentageIncludingAmortizationCost" abstract="false" name="DebtInstrumentInterestRateStatedPercentageIncludingAmortizationCost" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_ForeignExchangeContractBuyUnitedStatesDollarSellSwedishKronaMember" abstract="true" name="ForeignExchangeContractBuyUnitedStatesDollarSellSwedishKronaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ForeignExchangeContractBuyUnitedStatesDollarSellGreatBritainPoundMember" abstract="true" name="ForeignExchangeContractBuyUnitedStatesDollarSellGreatBritainPoundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ForeignExchangeContractBuyUnitedStatesDollarSellEuropeanDollarMember" abstract="true" name="ForeignExchangeContractBuyUnitedStatesDollarSellEuropeanDollarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ForeignExchangeContractBuyUnitedStatesDollarSellAustralianDollarMember" abstract="true" name="ForeignExchangeContractBuyUnitedStatesDollarSellAustralianDollarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ForeignExchangeContractBuyUnitedStatesDollarSellCanadianDollarMember" abstract="true" name="ForeignExchangeContractBuyUnitedStatesDollarSellCanadianDollarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ForeignExchangeContractBuyUnitedStatesDollarSellSwissFrancMember" abstract="true" name="ForeignExchangeContractBuyUnitedStatesDollarSellSwissFrancMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ForeignExchangeContractBuyGreatBritainPoundSellUnitedStatesDollarMember" abstract="true" name="ForeignExchangeContractBuyGreatBritainPoundSellUnitedStatesDollarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ForeignExchangeContractBuyEuropeanDollarSellUnitedStatesDollarMember" abstract="true" name="ForeignExchangeContractBuyEuropeanDollarSellUnitedStatesDollarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_ForeignExchangeContractBuyAustralianDollarSellUnitedStatesDollarMember" abstract="true" name="ForeignExchangeContractBuyAustralianDollarSellUnitedStatesDollarMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_GainLossOnSettlementsAndAccrualsOfFairValueHedgingInstruments" abstract="false" name="GainLossOnSettlementsAndAccrualsOfFairValueHedgingInstruments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_OtherComprehensiveIncomeLossNetInvestmentHedgeAndCashFlowHedgeGainLossBeforeReclassificationAndTax" abstract="false" name="OtherComprehensiveIncomeLossNetInvestmentHedgeAndCashFlowHedgeGainLossBeforeReclassificationAndTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_OtherComprehensiveIncomeLossCashFlowAndNetInvestmentHedgeGainLossReclassificationBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossCashFlowAndNetInvestmentHedgeGainLossReclassificationBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_PaymentsForDerivativeInstrumentInvestingActivitiesNetOfAdjustments" abstract="false" name="PaymentsForDerivativeInstrumentInvestingActivitiesNetOfAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_UnconsolidatedEntitiesMember" abstract="true" name="UnconsolidatedEntitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_OpenMarketDividendReinvestmentMember" abstract="true" name="OpenMarketDividendReinvestmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_CommonAndPreferredStockSharesAuthorized" abstract="false" name="CommonAndPreferredStockSharesAuthorized" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bxmt_DividendReinvestmentAndDirectStockPurchasePlanSharesAuthorized" abstract="false" name="DividendReinvestmentAndDirectStockPurchasePlanSharesAuthorized" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bxmt_DividendReinvestmentAndDirectStockPurchasePlanRemainingSharesAvailableForFutureIssuance" abstract="false" name="DividendReinvestmentAndDirectStockPurchasePlanRemainingSharesAvailableForFutureIssuance" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bxmt_SaleOfStockNumberOfEquityDistributionAgreements" abstract="false" name="SaleOfStockNumberOfEquityDistributionAgreements" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_SaleOfStockMaximumAuthorizedAmount" abstract="false" name="SaleOfStockMaximumAuthorizedAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_SaleOfStockRemainingAuthorizedAmount" abstract="false" name="SaleOfStockRemainingAuthorizedAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_DeferredStockUnitsMember" abstract="true" name="DeferredStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_CommonStockSharesOutstandingIncludingDeferredStockUnits" abstract="false" name="CommonStockSharesOutstandingIncludingDeferredStockUnits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bxmt_StockIssuedDuringPeriodSharesDeferredStockUnits" abstract="false" name="StockIssuedDuringPeriodSharesDeferredStockUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bxmt_DividendsCommonStockOrdinaryDividendsPercentage" abstract="false" name="DividendsCommonStockOrdinaryDividendsPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_DividendShareBasedPaymentArrangementCapitalGainsDividendsPercentage" abstract="false" name="DividendShareBasedPaymentArrangementCapitalGainsDividendsPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
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  <xs:element id="bxmt_ManagementFeeCoreEarningsFeePercentage" abstract="false" name="ManagementFeeCoreEarningsFeePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
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  <xs:element id="bxmt_LoanParticipationsSoldLiabilitiesFairValue" abstract="false" name="LoanParticipationsSoldLiabilitiesFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_FinancingReceivableNumberOfLoansModified" abstract="false" name="FinancingReceivableNumberOfLoansModified" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_BxmtAdvisorsLimitedLiabilityCompanyAndAffiliatesMember" abstract="true" name="BxmtAdvisorsLimitedLiabilityCompanyAndAffiliatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_BXMTAdvisorsLimitedLiabilityCompanyMember" abstract="true" name="BXMTAdvisorsLimitedLiabilityCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="bxmt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="bxmt_BrioRealEstateServicesLLCBrioRealEstateUKLtdAndBrioRealEstateAUSPtyLtdMember" abstract="true" name="BrioRealEstateServicesLLCBrioRealEstateUKLtdAndBrioRealEstateAUSPtyLtdMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_BREHotelsResortsLLCMember" abstract="true" name="BREHotelsResortsLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_RevantageCorporateServicesLLCAndRevantageGlobalServicesEuropeS.aR.l.Member" abstract="true" name="RevantageCorporateServicesLLCAndRevantageGlobalServicesEuropeS.aR.l.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_LendingOneMember" abstract="true" name="LendingOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_LivCorLLCMember" abstract="true" name="LivCorLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_BTIGLLCGryphonMutualPropertyAmericasICInternalAuditServicesLexingtonNationalLandServicesBlackstoneSecuritiesPartnersL.PMember" abstract="true" name="BTIGLLCGryphonMutualPropertyAmericasICInternalAuditServicesLexingtonNationalLandServicesBlackstoneSecuritiesPartnersL.PMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_BTIGLLCMember" abstract="true" name="BTIGLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_GryphonMutualPropertyAmericaICGryphonMember" abstract="true" name="GryphonMutualPropertyAmericaICGryphonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_BlackstoneInternalAuditServicesMember" abstract="true" name="BlackstoneInternalAuditServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_LexingtonNationalLandServicesMember" abstract="true" name="LexingtonNationalLandServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_BlackstoneSecuritiesPartnersL.PMember" abstract="true" name="BlackstoneSecuritiesPartnersL.PMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_CTInvestmentManagementCo.LLCCTIMCOMember" abstract="true" name="CTInvestmentManagementCo.LLCCTIMCOMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_AmountContributedToCaptiveTowardsInsurancePremium" abstract="false" name="AmountContributedToCaptiveTowardsInsurancePremium" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_CollateralizedLoanObligationsNumberOfAssets" abstract="false" name="CollateralizedLoanObligationsNumberOfAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_AgencyMultifamilyLendingPartnershipMember" abstract="true" name="AgencyMultifamilyLendingPartnershipMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_BlackstoneAdvisedInvestmentVehiclesOrTheFundsMember" abstract="true" name="BlackstoneAdvisedInvestmentVehiclesOrTheFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_PerformingLoansBlackstoneAdvisedInvestmentVehicleMember" abstract="true" name="PerformingLoansBlackstoneAdvisedInvestmentVehicleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_PerformingLoanMember" abstract="true" name="PerformingLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_MezzanineLoanMember" abstract="true" name="MezzanineLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_SeniorLoansBlackstoneAdvisedInvestmentVehicleMember" abstract="true" name="SeniorLoansBlackstoneAdvisedInvestmentVehicleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_SeniorLoanParticipationMember" abstract="true" name="SeniorLoanParticipationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_NumberOfLoansReferred" abstract="false" name="NumberOfLoansReferred" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_RelatedPartyTransactionInterestInLoanPercentage" abstract="false" name="RelatedPartyTransactionInterestInLoanPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_ProceedsOfLoanParticipations" abstract="false" name="ProceedsOfLoanParticipations" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateRemainingAmountOfMortgage" abstract="false" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateRemainingAmountOfMortgage" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_NumberOfLoansModified" abstract="false" name="NumberOfLoansModified" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_NumberOfLoansCount" abstract="false" name="NumberOfLoansCount" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bxmt_BoardOfDirectorsMember" abstract="true" name="BoardOfDirectorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="bxmt_CorporateGovernanceCommitteeMember" abstract="true" name="CorporateGovernanceCommitteeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="bxmt_AuditCommitteeMembersMember" abstract="true" name="AuditCommitteeMembersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="bxmt_OffBalanceSheetCreditLossLiabilityCommittedFinancings" abstract="false" name="OffBalanceSheetCreditLossLiabilityCommittedFinancings" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_OffBalanceSheetCreditLossLiabilityNet" abstract="false" name="OffBalanceSheetCreditLossLiabilityNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_OffBalanceSheetCreditLossLiabilityTerm" abstract="false" name="OffBalanceSheetCreditLossLiabilityTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bxmt_BoardOfDirectorsNumberOfDirectorsEligibleForCompensation" abstract="false" name="BoardOfDirectorsNumberOfDirectorsEligibleForCompensation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="bxmt_AnnualDirectorCompensationCash" abstract="false" name="AnnualDirectorCompensationCash" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_AnnualDirectorCompensationStock" abstract="false" name="AnnualDirectorCompensationStock" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_BoardOfDirectorsNumberOfMembersNotEligibleForAnnualCompensation" abstract="false" name="BoardOfDirectorsNumberOfMembersNotEligibleForAnnualCompensation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
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  <xs:element id="bxmt_MixedUseMember" abstract="true" name="MixedUseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateStatedInterestRate" abstract="false" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateStatedInterestRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateNet" abstract="false" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateAdditionsAbstract" abstract="true" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateAdditionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstatePaidInKindInterest" abstract="false" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstatePaidInKindInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateAmortizationOfDeferredLoanOriginationFeesNet" abstract="false" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateAmortizationOfDeferredLoanOriginationFeesNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateDeductionsAbstract" abstract="true" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateDeductionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateWriteoff" abstract="false" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateWriteoff" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateUnrealizedGainLossOnForeignCurrencyTranslation" abstract="false" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateUnrealizedGainLossOnForeignCurrencyTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bxmt_SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateDeferredFeesAndOtherItemsIncreaseDecrease" abstract="false" name="SECSchedule1229RealEstateCompaniesInvestmentInMortgageLoansOnRealEstateDeferredFeesAndOtherItemsIncreaseDecrease" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
