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  <xs:element name="USARELLCWarrantsToAcquireClassCPreferredUnitsMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_USARELLCWarrantsToAcquireClassCPreferredUnitsMember"/>
  <xs:element name="USARareEarthIncMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_USARareEarthIncMember"/>
  <xs:element name="ValuationOfTheDerivativeLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_ValuationOfTheDerivativeLiabilityMember"/>
  <xs:element name="ValuationsOfTheEarnOutAndWarrantLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_ValuationsOfTheEarnOutAndWarrantLiabilityMember"/>
  <xs:element name="ValuationsOfTheEarnoutLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_ValuationsOfTheEarnoutLiabilityMember"/>
  <xs:element name="ValuationsOfTheWarrantLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_ValuationsOfTheWarrantLiabilityMember"/>
  <xs:element name="WarrantLiabilityMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_WarrantLiabilityMember"/>
  <xs:element name="WarrantsEachWholeWarrantExercisableForOneShareOfCommonStockEachAtAnExercisePriceOf1150PerShareMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_WarrantsEachWholeWarrantExercisableForOneShareOfCommonStockEachAtAnExercisePriceOf1150PerShareMember"/>
  <xs:element name="WarrantsToAcquireCommonStockMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_WarrantsToAcquireCommonStockMember"/>
  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="usar_DocumentAndEntityInformationAbstract"/>
</xs:schema>
