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    <element id="SINT_SinapticHoldingsLLCMember" name="SinapticHoldingsLLCMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_CommonStockPrivatePlacementMember" name="CommonStockPrivatePlacementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_WarrantsMember" name="WarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_CommonStockWarrantsMember" name="CommonStockWarrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_BlackScholesMertonValuationModelMember" name="BlackScholesMertonValuationModelMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_InsurancePremiumFinanceArrangementsMember" name="InsurancePremiumFinanceArrangementsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_DirectorAndOfficerProfessionalLiabilityInsuranceMember" name="DirectorAndOfficerProfessionalLiabilityInsuranceMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_IndustrialLeaseAgreementMember" name="IndustrialLeaseAgreementMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_GrantExpenses" name="GrantExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_ChangeInFairValueOfDerivativeLiabilities" name="ChangeInFairValueOfDerivativeLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_StockIssuedDuringPeriodValueCashlessExerciseOfWarrants" name="StockIssuedDuringPeriodValueCashlessExerciseOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants" name="StockIssuedDuringPeriodSharesCashlessExerciseOfWarrants" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_PurchaseOfCommonStockIntoTreasury" name="PurchaseOfCommonStockIntoTreasury" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_StockIssuedDuringPeriodValueIssuanceOfCommonStockInConnectionWithAtmNetOfFees" name="StockIssuedDuringPeriodValueIssuanceOfCommonStockInConnectionWithAtmNetOfFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_StockIssuedDuringPeriodSharesIssuanceOfCommonStockInConnectionWithAtmNetOfFees" name="StockIssuedDuringPeriodSharesIssuanceOfCommonStockInConnectionWithAtmNetOfFees" nillable="true" xbrli:periodType="duration" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_StockBasedCompensationNonemployee" name="StockBasedCompensationNonemployee" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_DisposalOfPropertyAndEquipmentNetOfCashReceived" name="DisposalOfPropertyAndEquipmentNetOfCashReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_ProceedsFromIssuanceOfCommonStockInConnectionWithAtmNetOfFees" name="ProceedsFromIssuanceOfCommonStockInConnectionWithAtmNetOfFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_DebtIssuedForPrepaidInsurance" name="DebtIssuedForPrepaidInsurance" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_NoncashDisposalOfSubsidiaryAssets" name="NoncashDisposalOfSubsidiaryAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_NoncashDisposalOfSubsidiaryLiabilities" name="NoncashDisposalOfSubsidiaryLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_DisclosureLeasesAbstract" name="DisclosureLeasesAbstract" abstract="true" nillable="true" xbrli:periodType="duration" type="xbrli:stringItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_LiquidityAndCapitalResourcesPolicyTextBlock" name="LiquidityAndCapitalResourcesPolicyTextBlock" nillable="true" xbrli:periodType="duration" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_SaleOfStockInRemainingAmount" name="SaleOfStockInRemainingAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_NetLossBasicCalculation" name="NetLossBasicCalculation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_NetLossEffectOfDilutiveWarrantSecurities" name="NetLossEffectOfDilutiveWarrantSecurities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_NetLossDilutedCalculation" name="NetLossDilutedCalculation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_NetIncomeEffectOfDilutiveWarrantSecuritiesPerShare" name="NetIncomeEffectOfDilutiveWarrantSecuritiesPerShare" nillable="true" xbrli:periodType="duration" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_InventoryTotal" name="InventoryTotal" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_AccruedPayableCurrent" name="AccruedPayableCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_UpFrontInsurancePremium" name="UpFrontInsurancePremium" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_FinancedInsurancePremium" name="FinancedInsurancePremium" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_SharebasedCompensationArrangementByGrantedSharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" name="SharebasedCompensationArrangementByGrantedSharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" nillable="true" xbrli:periodType="duration" type="xbrli:durationItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_InducementLetterMember" name="InducementLetterMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_PreFundedWarrantMember" name="PreFundedWarrantMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
    <element id="SINT_EmployeeStockGrantsMember" name="EmployeeStockGrantsMember" nillable="true" xbrli:periodType="duration" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" />
</schema>
