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  <xsd:element abstract="true" id="axti_CurrentTopFiveCustomersMember" name="CurrentTopFiveCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_DebtInstrumentOptionToRepurchaseProductionLineAndRelatedEquipment" name="DebtInstrumentOptionToRepurchaseProductionLineAndRelatedEquipment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="axti_DeferredTaxAssetsOperatingLeaseLiability" name="DeferredTaxAssetsOperatingLeaseLiability" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="axti_DingxingAndKazuoMember" name="DingxingAndKazuoMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_DingxingMember" name="DingxingMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_EffectOfForeignCurrencyTranslationOnRedeemableNoncontrollingInterests" name="EffectOfForeignCurrencyTranslationOnRedeemableNoncontrollingInterests" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="axti_EffectOfStockBasedCompensationOnBasicEarningsPerShare" name="EffectOfStockBasedCompensationOnBasicEarningsPerShare" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_EffectOfStockBasedCompensationOnDilutedEarningsPerShare" name="EffectOfStockBasedCompensationOnDilutedEarningsPerShare" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_EffectiveIncomeTaxRateReconciliationForeignIncomeInclusion" name="EffectiveIncomeTaxRateReconciliationForeignIncomeInclusion" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_EffectiveIncomeTaxRateReconciliationForeignTaxIncentives" name="EffectiveIncomeTaxRateReconciliationForeignTaxIncentives" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseEnhancedResearchDeductionAmount" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseEnhancedResearchDeductionAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="axti_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseEnhancedResearchDeductionPercentage" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseEnhancedResearchDeductionPercentage" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_EmeishanJiaMeiHighPurityMetalsMember" name="EmeishanJiaMeiHighPurityMetalsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_EnterpriseIncomeTaxLawPercentage" name="EnterpriseIncomeTaxLawPercentage" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_EquipmentLeaseMember" name="EquipmentLeaseMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_EquityIncentivePlan2007Member" name="EquityIncentivePlan2007Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_EquityIncentivePlan2015Member" name="EquityIncentivePlan2015Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_EquityIncentivePlan2025Member" name="EquityIncentivePlan2025Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_EquityMethodInvestmentRealizedGainLossOnAdjustmentToFairValue" name="EquityMethodInvestmentRealizedGainLossOnAdjustmentToFairValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="axti_EquityMethodInvestmentSummarizedBalanceSheetInformationTableTextBlock" name="EquityMethodInvestmentSummarizedBalanceSheetInformationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_EquityMethodInvestmentsDividendReturns" name="EquityMethodInvestmentsDividendReturns" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="axti_EquityMethodInvestmentsIncomeLossExcludingImpairmentCharges" name="EquityMethodInvestmentsIncomeLossExcludingImpairmentCharges" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="axti_EquityMethodInvestmentsSummarizedIncomeInformationTableTextBlock" name="EquityMethodInvestmentsSummarizedIncomeInformationTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ExcessAndObsoleteInventoryMember" name="ExcessAndObsoleteInventoryMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ExercisePriceRangeFiveMember" name="ExercisePriceRangeFiveMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ExercisePriceRangeFourMember" name="ExercisePriceRangeFourMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ExercisePriceRangeOneMember" name="ExercisePriceRangeOneMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ExercisePriceRangeThreeMember" name="ExercisePriceRangeThreeMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ExercisePriceRangeTwoMember" name="ExercisePriceRangeTwoMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_February2025BankLoanMember" name="February2025BankLoanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_FiveMinorityInvestmentsMember" name="FiveMinorityInvestmentsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_ImpairedInvestmentPolicyPolicyTextBlock" name="ImpairedInvestmentPolicyPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_IncomeLossFromGovernmentSubsidy" name="IncomeLossFromGovernmentSubsidy" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="axti_IncreaseInNoncontrollingInterestsDueToTransferOfSubsidiaryWithNoncontrollingInterests" name="IncreaseInNoncontrollingInterestsDueToTransferOfSubsidiaryWithNoncontrollingInterests" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="axti_IncreaseInRedeemableNoncontrollingInterestsDueToTransferOfSubsidiaryWithNoncontrollingInterests" name="IncreaseInRedeemableNoncontrollingInterestsDueToTransferOfSubsidiaryWithNoncontrollingInterests" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_IndustrialAndCommercialBankOfChinaMember" name="IndustrialAndCommercialBankOfChinaMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_IndustrialBankMember" name="IndustrialBankMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_InvestmentsAndFairValueMeasurementTextBlock" name="InvestmentsAndFairValueMeasurementTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_InvestorOneMember" name="InvestorOneMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_InvestorTwoMember" name="InvestorTwoMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_JaiMeiMember" name="JaiMeiMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_JiaMeiInvestmentMember" name="JiaMeiInvestmentMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_JointVentureAgreementInitialInvestmentAmount" name="JointVentureAgreementInitialInvestmentAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="axti_JointVentureFormationProjectedInvestmentPayment" name="JointVentureFormationProjectedInvestmentPayment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_KazuoMember" name="KazuoMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_LesseeSupplementalCashFlowInformationOfOperatingLeasesTableTextBlock" name="LesseeSupplementalCashFlowInformationOfOperatingLeasesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_LoanFromRelatedPartyMember" name="LoanFromRelatedPartyMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_LowerOfCostsOrNetRealizedValueInventoryMember" name="LowerOfCostsOrNetRealizedValueInventoryMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ManufacturingEquipmentMember" name="ManufacturingEquipmentMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_MinorityInvestorMember" name="MinorityInvestorMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_NanjingBankMember" name="NanjingBankMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_NanjingJinMeiGalliumMember" name="NanjingJinMeiGalliumMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_NingboBankMember" name="NingboBankMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_NoncontrollingInterestsInvestmentsInSubsidiary" name="NoncontrollingInterestsInvestmentsInSubsidiary" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="axti_NoncurrentAssetsExcludingOtherAssets" name="NoncurrentAssetsExcludingOtherAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="axti_NonredeemableNoncontrollingInterestsIncreaseDecrease" name="NonredeemableNoncontrollingInterestsIncreaseDecrease" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_NumberOfInvestors" name="NumberOfInvestors" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_NumberOfMajorCustomers" name="NumberOfMajorCustomers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_NumberOfMinorityInvestmentEntitiesAccountedUnderEquityMethod" name="NumberOfMinorityInvestmentEntitiesAccountedUnderEquityMethod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_NumberOfProductLines" name="NumberOfProductLines" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_OneCustomerMember" name="OneCustomerMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_OregontaxauthorityMember" name="OregontaxauthorityMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_OtherNonoperatingIncomeExpenseOthers" name="OtherNonoperatingIncomeExpenseOthers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="axti_OtherPersonnelRelatedCostsCurrent" name="OtherPersonnelRelatedCostsCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="axti_PRCSubsidiariesAndRawMaterialJointVenturesMember" name="PRCSubsidiariesAndRawMaterialJointVenturesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_PayableInConnectionWithConstructionInProgressCurrent" name="PayableInConnectionWithConstructionInProgressCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="axti_PercentageOfEquityInterestSold" name="PercentageOfEquityInterestSold" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_PercentageOfEquityIssuedOnConversionOfNonControllingInterests" name="PercentageOfEquityIssuedOnConversionOfNonControllingInterests" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_PercentageOfEquityMethodInvestmentInterestSold" name="PercentageOfEquityMethodInvestmentInterestSold" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_PercentageOfEquityPurchasedByEmployeesKeyManagersAndContributors" name="PercentageOfEquityPurchasedByEmployeesKeyManagersAndContributors" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_PercentageOfTargetedFinancialPerformance" name="PercentageOfTargetedFinancialPerformance" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_PerformanceBasedVestingMember" name="PerformanceBasedVestingMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_PolicyTable" name="PolicyTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_PreferentialTaxRate" name="PreferentialTaxRate" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_ProceedsFromCapitalIncreaseInSubsidiarySharesFromNoncontrollingInterest" name="ProceedsFromCapitalIncreaseInSubsidiarySharesFromNoncontrollingInterest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="axti_ProceedsFromLoanByNotes" name="ProceedsFromLoanByNotes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="axti_PropertyPlantAndEquipmentIncludingConstructionProgress" name="PropertyPlantAndEquipmentIncludingConstructionProgress" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="axti_RawMaterialSalesMember" name="RawMaterialSalesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_RawMaterialsAndOtherMember" name="RawMaterialsAndOtherMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_RawMaterialsMember" name="RawMaterialsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_RedeemableNonControllingInterestsOwnershipPercentage" name="RedeemableNonControllingInterestsOwnershipPercentage" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_RedeemableNonControllingInterestsStockIssuanceCosts" name="RedeemableNonControllingInterestsStockIssuanceCosts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="axti_RedeemableNoncontrollingInterestsForeignCurrencyTranslationAdjustments" name="RedeemableNoncontrollingInterestsForeignCurrencyTranslationAdjustments" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ReserveSalesReturnsMember" name="ReserveSalesReturnsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_RestrictedStockRestrictedStockUnitsAndPerformanceAwardsMember" name="RestrictedStockRestrictedStockUnitsAndPerformanceAwardsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_SaleOfLandAndBuildingToUnconsolidatedJointVenture" name="SaleOfLandAndBuildingToUnconsolidatedJointVenture" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ScenarioPerformanceFinancialMetricGreaterThan200Member" name="ScenarioPerformanceFinancialMetricGreaterThan200Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ScenarioPerformanceFinancialMetricIsBetween50To200Member" name="ScenarioPerformanceFinancialMetricIsBetween50To200Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ScenarioPerformanceFinancialMetricLessThan50Member" name="ScenarioPerformanceFinancialMetricLessThan50Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_ScheduleOfIncomeTaxesPaidByIndividualJurisdictionTableTextBlock" name="ScheduleOfIncomeTaxesPaidByIndividualJurisdictionTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_ScheduleOfShareBasedCompensationCommonStockReservedForFutureIssuanceTableTextBlock" name="ScheduleOfShareBasedCompensationCommonStockReservedForFutureIssuanceTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceTargetCapPercentage" name="SharebasedCompensationArrangementBySharebasedPaymentAwardPerformanceTargetCapPercentage" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="axti_SharebasedPaymentArrangementNumberOfSharesEligibleToVest" name="SharebasedPaymentArrangementNumberOfSharesEligibleToVest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="axti_ShortTermLoanNoncontrollingInterestMember" name="ShortTermLoanNoncontrollingInterestMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_SpecialtyMaterialSubstratesMember" name="SpecialtyMaterialSubstratesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_StockBasedCompensationAttributableToNoncontrollingInterest" name="StockBasedCompensationAttributableToNoncontrollingInterest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="axti_StockbasedCompensationAttributableToRedeemableNoncontrollingInterest" name="StockbasedCompensationAttributableToRedeemableNoncontrollingInterest" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_SubsidiaryBankLoanMember" name="SubsidiaryBankLoanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_SubstratesMember" name="SubstratesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_TemperatureInCelsius" name="TemperatureInCelsius" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_TermOfAgreement" name="TermOfAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_TheSeptemberAndNovember2025BankLoanMember" name="TheSeptemberAndNovember2025BankLoanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_ThirdpartyCustomersMember" name="ThirdpartyCustomersMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_TimeBasedVestingMember" name="TimeBasedVestingMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="axti_TotalInvestmentAgreementValue" name="TotalInvestmentAgreementValue" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="axti_TotalInvestmentOfJointVentureAgreement" name="TotalInvestmentOfJointVentureAgreement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="axti_XiaoyiXinganGalliumMember" name="XiaoyiXinganGalliumMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-1-the-company-and-summary-of-significant-accounting-policies-schedule-of-accumulated-other-comprehensive-income-loss-details" name="statement-statement-note-1-the-company-and-summary-of-significant-accounting-policies-schedule-of-accumulated-other-comprehensive-income-loss-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-1-the-company-and-summary-of-significant-accounting-policies-schedule-of-contract-with-customer-liabilities-details" name="statement-statement-note-1-the-company-and-summary-of-significant-accounting-policies-schedule-of-contract-with-customer-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-1-the-company-and-summary-of-significant-accounting-policies-tables" name="statement-statement-note-1-the-company-and-summary-of-significant-accounting-policies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-schedule-of-common-stock-reserved-and-available-for-future-issuance-details" name="statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-schedule-of-common-stock-reserved-and-available-for-future-issuance-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-schedule-of-options-outstanding-and-exercisable-exercise-range-details" name="statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-schedule-of-options-outstanding-and-exercisable-exercise-range-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-summary-of-compensation-costs-related-to-stockbased-compensation-awards-details" name="statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-summary-of-compensation-costs-related-to-stockbased-compensation-awards-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-summary-of-performance-shares-activity-details" name="statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-summary-of-performance-shares-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-summary-of-restricted-stock-awards-details" name="statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-summary-of-restricted-stock-awards-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-summary-of-stock-options-details" name="statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-summary-of-stock-options-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-tables" name="statement-statement-note-10-employee-benefit-plans-and-stockbased-compensation-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-11-guarantees-schedule-of-product-warranty-liability-details" name="statement-statement-note-11-guarantees-schedule-of-product-warranty-liability-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-11-guarantees-tables" name="statement-statement-note-11-guarantees-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-12-income-taxes-cash-paid-for-income-taxes-details" name="statement-statement-note-12-income-taxes-cash-paid-for-income-taxes-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-12-income-taxes-schedule-of-components-of-income-tax-expense-benefit-details" name="statement-statement-note-12-income-taxes-schedule-of-components-of-income-tax-expense-benefit-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-12-income-taxes-schedule-of-deferred-tax-assets-and-liabilities-details" name="statement-statement-note-12-income-taxes-schedule-of-deferred-tax-assets-and-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-12-income-taxes-schedule-of-effective-income-tax-reconciliation-details" name="statement-statement-note-12-income-taxes-schedule-of-effective-income-tax-reconciliation-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-12-income-taxes-tables" name="statement-statement-note-12-income-taxes-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-13-net-income-loss-per-share-reconciliation-of-earnings-per-share-details" name="statement-statement-note-13-net-income-loss-per-share-reconciliation-of-earnings-per-share-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-13-net-income-loss-per-share-tables" name="statement-statement-note-13-net-income-loss-per-share-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-14-segment-information-and-foreign-operations-reconciliation-of-longlived-assets-by-geographic-region-details" name="statement-statement-note-14-segment-information-and-foreign-operations-reconciliation-of-longlived-assets-by-geographic-region-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-14-segment-information-and-foreign-operations-reporting-of-segment-revenue-by-product-type-details" name="statement-statement-note-14-segment-information-and-foreign-operations-reporting-of-segment-revenue-by-product-type-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-14-segment-information-and-foreign-operations-segment-revenue-reporting-by-geographic-region-details" name="statement-statement-note-14-segment-information-and-foreign-operations-segment-revenue-reporting-by-geographic-region-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-14-segment-information-and-foreign-operations-tables" name="statement-statement-note-14-segment-information-and-foreign-operations-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-15-other-income-expense-net-details" name="statement-statement-note-15-other-income-expense-net-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-15-other-income-expense-net-tables" name="statement-statement-note-15-other-income-expense-net-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-16-commitments-and-contingencies-schedule-of-lease-cost-details" name="statement-statement-note-16-commitments-and-contingencies-schedule-of-lease-cost-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-16-commitments-and-contingencies-schedule-of-lease-supplemental-cash-flow-information-details" name="statement-statement-note-16-commitments-and-contingencies-schedule-of-lease-supplemental-cash-flow-information-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-16-commitments-and-contingencies-schedule-of-operating-lease-maturities-details" name="statement-statement-note-16-commitments-and-contingencies-schedule-of-operating-lease-maturities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-16-commitments-and-contingencies-tables" name="statement-statement-note-16-commitments-and-contingencies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-17-redeemable-noncontrolling-interests-schedule-of-redeemable-noncontrolling-interests-details" name="statement-statement-note-17-redeemable-noncontrolling-interests-schedule-of-redeemable-noncontrolling-interests-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-17-redeemable-noncontrolling-interests-tables" name="statement-statement-note-17-redeemable-noncontrolling-interests-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-2-investments-and-fair-value-measurements-schedule-of-cash-cash-equivalents-and-investments-details" name="statement-statement-note-2-investments-and-fair-value-measurements-schedule-of-cash-cash-equivalents-and-investments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-2-investments-and-fair-value-measurements-tables" name="statement-statement-note-2-investments-and-fair-value-measurements-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-3-inventories-schedule-of-inventory-details" name="statement-statement-note-3-inventories-schedule-of-inventory-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-3-inventories-tables" name="statement-statement-note-3-inventories-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-5-property-plant-and-equipment-net-schedule-of-property-plant-and-equipment-details" name="statement-statement-note-5-property-plant-and-equipment-net-schedule-of-property-plant-and-equipment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-5-property-plant-and-equipment-net-tables" name="statement-statement-note-5-property-plant-and-equipment-net-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-6-investments-in-privately-held-raw-material-companies-tables" name="statement-statement-note-6-investments-in-privately-held-raw-material-companies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-6-investments-in-privatelyheld-raw-material-companies-equity-method-investment-summarized-balance-sheet-information-details" name="statement-statement-note-6-investments-in-privatelyheld-raw-material-companies-equity-method-investment-summarized-balance-sheet-information-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-6-investments-in-privatelyheld-raw-material-companies-summary-information-for-equity-method-investments-details" name="statement-statement-note-6-investments-in-privatelyheld-raw-material-companies-summary-information-for-equity-method-investments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-6-investments-in-privatelyheld-raw-material-companies-summary-of-investments-details" name="statement-statement-note-6-investments-in-privatelyheld-raw-material-companies-summary-of-investments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-7-balance-sheet-details-schedule-of-accrued-liabilities-details" name="statement-statement-note-7-balance-sheet-details-schedule-of-accrued-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-7-balance-sheet-details-tables" name="statement-statement-note-7-balance-sheet-details-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-7-balance-sheets-details-schedule-of-other-assets-noncurrent-details" name="statement-statement-note-7-balance-sheets-details-schedule-of-other-assets-noncurrent-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-8-bank-loans-and-line-of-credit-maturities-of-longterm-loans-details" name="statement-statement-note-8-bank-loans-and-line-of-credit-maturities-of-longterm-loans-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-8-bank-loans-and-line-of-credit-schedule-of-shortterm-debt-details" name="statement-statement-note-8-bank-loans-and-line-of-credit-schedule-of-shortterm-debt-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-note-8-bank-loans-and-line-of-credit-tables" name="statement-statement-note-8-bank-loans-and-line-of-credit-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="axti_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
