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  <xsd:element name="ReimbursableCostsRelatedParty" id="reemf_ReimbursableCostsRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PaymentsForDemonstrationPlantProjectCosts" id="reemf_PaymentsForDemonstrationPlantProjectCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EquityIncentivePlan2022Member" id="reemf_EquityIncentivePlan2022Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WyomingEnergyAuthorityMember" id="reemf_WyomingEnergyAuthorityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TenPercentRollingStockOptionPlanMember" id="reemf_TenPercentRollingStockOptionPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FundingAgreementMember" id="reemf_FundingAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FundingAgreementNumberOfMilestoneDuringDevelopmentProcess" id="reemf_FundingAgreementNumberOfMilestoneDuringDevelopmentProcess" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="FundingAgreementPercentageOfActualExpensesConditionalForGrant" id="reemf_FundingAgreementPercentageOfActualExpensesConditionalForGrant" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ProceedsFromGrants" id="reemf_ProceedsFromGrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="PercentageOfVestingOnRollingStock" id="reemf_PercentageOfVestingOnRollingStock" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ExpectedNetProceedsFromRightsOffering" id="reemf_ExpectedNetProceedsFromRightsOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="WyomingEnergyAuthorityGrantAbstract" id="reemf_WyomingEnergyAuthorityGrantAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WyomingEnergyAuthorityGrantTextBlock" id="reemf_WyomingEnergyAuthorityGrantTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="GrantAmountInvoiced" id="reemf_GrantAmountInvoiced" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PercentOfExpectedTotalCostOfDemonstrationPlantFundedUnderCostShareFundingAgreement" id="reemf_PercentOfExpectedTotalCostOfDemonstrationPlantFundedUnderCostShareFundingAgreement" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DemonstrationPlantProjectUpdatedBudget" id="reemf_DemonstrationPlantProjectUpdatedBudget" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DemonstrationPlantProjectBudgetIncreasePercentage" id="reemf_DemonstrationPlantProjectBudgetIncreasePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DemonstrationPlantProjectOriginalBudget" id="reemf_DemonstrationPlantProjectOriginalBudget" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="MaximumAdditionalCashAdvancesForProjectFundingAgreementForProjectCompletion" id="reemf_MaximumAdditionalCashAdvancesForProjectFundingAgreementForProjectCompletion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PaymentsForAdvancePaymentsUnderProjectFunding" id="reemf_PaymentsForAdvancePaymentsUnderProjectFunding" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="AdditionalCostShareFundingCommitment" id="reemf_AdditionalCostShareFundingCommitment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RelatedPartyTransactionFundsReturned" id="reemf_RelatedPartyTransactionFundsReturned" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="GrantIncomeNotYetRecognizedAmount" id="reemf_GrantIncomeNotYetRecognizedAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DemonstrationPlantProjectAmountExpensed" id="reemf_DemonstrationPlantProjectAmountExpensed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="WyomingEnergyAuthorityGrantTable" id="reemf_WyomingEnergyAuthorityGrantTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WyomingEnergyAuthorityGrantLineItems" id="reemf_WyomingEnergyAuthorityGrantLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DemonstrationPlantProjectExpectedMonthlyOnGoingCost" id="reemf_DemonstrationPlantProjectExpectedMonthlyOnGoingCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DemonstrationPlantProjectTotalEstimatedBudget" id="reemf_DemonstrationPlantProjectTotalEstimatedBudget" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="RightsOffering2024Member" id="reemf_RightsOffering2024Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RightsOffering2026Member" id="reemf_RightsOffering2026Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RightsOffering2021Member" id="reemf_RightsOffering2021Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="WeightedAverageNumberOfSharesOutstandingBeforeAdjustmentForRightsOffering" id="reemf_WeightedAverageNumberOfSharesOutstandingBeforeAdjustmentForRightsOffering" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
</xsd:schema>
