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  <xs:element id="efr_NicholsRanchMember" abstract="false" name="NicholsRanchMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_RestrictedCashAndCashEquivalentsRollForward" abstract="true" name="RestrictedCashAndCashEquivalentsRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="efr_BusinessCombinationAcquiredSharesConvertedToCommonStock" abstract="false" name="BusinessCombinationAcquiredSharesConvertedToCommonStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_PurchaseAgreementPurchasePrice" abstract="false" name="PurchaseAgreementPurchasePrice" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_AtTheMarketSaleOfStockMember" abstract="true" name="AtTheMarketSaleOfStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_TradeReceivablesAfterAllowanceForCreditLossCurrent" abstract="false" name="TradeReceivablesAfterAllowanceForCreditLossCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_AssetRetirementObligationAndOtherLiabilitiesHeldForSaleCurrent" abstract="false" name="AssetRetirementObligationAndOtherLiabilitiesHeldForSaleCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageRemainingContractualTerm" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageRemainingContractualTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableAggregateIntrinsicValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableAggregateIntrinsicValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_SharebasedCompensationAwardTrancheFourMember" abstract="true" name="SharebasedCompensationAwardTrancheFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_RevenuesAlternateFeedMaterialsProcessingandOther" abstract="false" name="RevenuesAlternateFeedMaterialsProcessingandOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_UnderutilizedCapacityProductionCostsRareEarthConcentrates" abstract="false" name="UnderutilizedCapacityProductionCostsRareEarthConcentrates" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ChangeInValueOfInvestmentsAccountedAtFairValue" abstract="false" name="ChangeInValueOfInvestmentsAccountedAtFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExercisablePeriod" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExercisablePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="efr_Customer2Member" abstract="true" name="Customer2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_PurchaseAgreementPaymentDueAtClosing" abstract="false" name="PurchaseAgreementPaymentDueAtClosing" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_PublicOfferingMember" abstract="true" name="PublicOfferingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_AccruedOperatingExpense" abstract="false" name="AccruedOperatingExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitedInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitedInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="efr_ConvertibleNotesReceivableConversionLimitationPerTransaction" abstract="false" name="ConvertibleNotesReceivableConversionLimitationPerTransaction" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ConvertibleNoteReceivableConsiderationReceived" abstract="false" name="ConvertibleNoteReceivableConsiderationReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ThirdPaymentMember" abstract="true" name="ThirdPaymentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_AccruedCapitalExpenditures" abstract="false" name="AccruedCapitalExpenditures" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_CostOfRevenueRareEarthConcentrates" abstract="false" name="CostOfRevenueRareEarthConcentrates" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_OtherGeographicAreaMember" abstract="true" name="OtherGeographicAreaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_ComponentOfOtherIncomeExpense" abstract="false" name="ComponentOfOtherIncomeExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_IncreaseDecreaseInCapitalExpendituresIncurredButNotYetPaid" abstract="false" name="IncreaseDecreaseInCapitalExpendituresIncurredButNotYetPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ConvertibleNoteReceivableTerm" abstract="false" name="ConvertibleNoteReceivableTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="efr_DevelopmentPermittingAndLandHolding" abstract="false" name="DevelopmentPermittingAndLandHolding" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_VirginiaEnergyResourcesIncMember" abstract="true" name="VirginiaEnergyResourcesIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_Customer1Member" abstract="true" name="Customer1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_DisposalGroupWarrantsIssued" abstract="false" name="DisposalGroupWarrantsIssued" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_GainOnDisposalOfNonCoreAssets" abstract="false" name="GainOnDisposalOfNonCoreAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_RevenuesVanadiumConcentrates" abstract="false" name="RevenuesVanadiumConcentrates" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_UnrecognizedCompensationCostsRelatedToRSUAwards" abstract="false" name="UnrecognizedCompensationCostsRelatedToRSUAwards" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ItemsThatMayBeReclassifedInTheFutureToProfitAndLossAbstract" abstract="true" name="ItemsThatMayBeReclassifedInTheFutureToProfitAndLossAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="efr_NoncashAcquisitionOfConvertibleNote" abstract="false" name="NoncashAcquisitionOfConvertibleNote" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_DisposalGroupCashDueAtClosing" abstract="false" name="DisposalGroupCashDueAtClosing" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentUsagePeriod" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentUsagePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="efr_StandbyCosts" abstract="false" name="StandbyCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ScheduleOfSummaryOfMineralPropertiesTableTextBlock" abstract="false" name="ScheduleOfSummaryOfMineralPropertiesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="efr_ConvertibleNotesReceivablePremium" abstract="false" name="ConvertibleNotesReceivablePremium" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="efr_UndiscountedDecommissioningLiability" abstract="false" name="UndiscountedDecommissioningLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ValuationAllowanceDeferredTaxAssetAdditionsAmount" abstract="false" name="ValuationAllowanceDeferredTaxAssetAdditionsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_StockIssuedDuringPeriodValueCashPaymentforTaxWithholding" abstract="false" name="StockIssuedDuringPeriodValueCashPaymentforTaxWithholding" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_SubscriptionAgreementPurchasePrice" abstract="false" name="SubscriptionAgreementPurchasePrice" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_StockIssuanceCosts" abstract="false" name="StockIssuanceCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_AcquisitionOfMineralProperties" abstract="false" name="AcquisitionOfMineralProperties" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAndNonEquityInstrumentsExercisesInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAndNonEquityInstrumentsExercisesInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="efr_BahiaProjectMember" abstract="true" name="BahiaProjectMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_PurchaseAgreementMilesToPurchase" abstract="false" name="PurchaseAgreementMilesToPurchase" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="efr_ScheduleofAssetRetirementObligationsLineItems" abstract="true" name="ScheduleofAssetRetirementObligationsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="efr_MineralPropertiesAxis" abstract="true" name="MineralPropertiesAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="efr_SharePurchaseWarrantsScheduleAxis" abstract="true" name="SharePurchaseWarrantsScheduleAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="efr_AltaMesaDivestitureMember" abstract="true" name="AltaMesaDivestitureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_RSUWeightedMember" abstract="false" name="RSUWeightedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_ShareBasedCompensationTransactionAxis" abstract="true" name="ShareBasedCompensationTransactionAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="efr_RestrictedCashAndCashEquivalentsHeldForSale" abstract="false" name="RestrictedCashAndCashEquivalentsHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_PinyonPlainMember" abstract="true" name="PinyonPlainMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTermInstant" abstract="false" name="SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTermInstant" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="efr_DisposalGroupProceedsForPaymentAgreement" abstract="false" name="DisposalGroupProceedsForPaymentAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_SharesIssuedForCashByAtTheMarketOfferingShares" abstract="false" name="SharesIssuedForCashByAtTheMarketOfferingShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_SharebasedCompensationAwardTrancheFiveMember" abstract="true" name="SharebasedCompensationAwardTrancheFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_Customer6Member" abstract="true" name="Customer6Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_TransactionTwoMember" abstract="true" name="TransactionTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_ChangeInValueOfWarrantLiabilities" abstract="false" name="ChangeInValueOfWarrantLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_AssetRetirementObligationHeldForSale" abstract="false" name="AssetRetirementObligationHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_OtherReceivablesAfterAllowanceForCreditLossCurrent" abstract="false" name="OtherReceivablesAfterAllowanceForCreditLossCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_MeasurementInputYieldMember" abstract="true" name="MeasurementInputYieldMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_PercentageOfFairValueInvestment" abstract="false" name="PercentageOfFairValueInvestment" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="efr_DeferredTaxAssetsMineralPropertiesAndDeferredCostsUnitedStates" abstract="false" name="DeferredTaxAssetsMineralPropertiesAndDeferredCostsUnitedStates" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_Pre2018NetOperatingLossesMember" abstract="true" name="Pre2018NetOperatingLossesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_ConvertibleNotesReceivableSold" abstract="false" name="ConvertibleNotesReceivableSold" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_StandbyPropertiesPolicyPolicyTextBlock" abstract="false" name="StandbyPropertiesPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="efr_SharebasedCompensationAwardTrancheSixMember" abstract="true" name="SharebasedCompensationAwardTrancheSixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_TransactionOneMember" abstract="true" name="TransactionOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_NotesReceivableAmortizedCost" abstract="false" name="NotesReceivableAmortizedCost" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_September202021ExpirationDateMember" abstract="true" name="September202021ExpirationDateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_ConvertibleNoteReceivableRedeemed" abstract="false" name="ConvertibleNoteReceivableRedeemed" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_OtherMember" abstract="false" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_SharePurchaseWarrantsScheduleDomain" abstract="false" name="SharePurchaseWarrantsScheduleDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_Customer4Member" abstract="true" name="Customer4Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_DeferredTaxAssetsDeferredIncomeandOtherNoncurrent" abstract="false" name="DeferredTaxAssetsDeferredIncomeandOtherNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ShareBasedPaymentArrangementStockAppreciationRightValuationAssumptionsTableTextBlock" abstract="false" name="ShareBasedPaymentArrangementStockAppreciationRightValuationAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableNumber" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_ValuationAllowanceDeferredTaxAssetDeductionsAmount" abstract="false" name="ValuationAllowanceDeferredTaxAssetDeductionsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_DisposalGroupSharesReceivedInTransactionPricePerShare" abstract="false" name="DisposalGroupSharesReceivedInTransactionPricePerShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="efr_PurchaseAgreementsNumberOfMineralConcessionsAcquired" abstract="false" name="PurchaseAgreementsNumberOfMineralConcessionsAcquired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="efr_DeferredTaxAssetsMineralPropertiesAndDeferredCostsCanada" abstract="false" name="DeferredTaxAssetsMineralPropertiesAndDeferredCostsCanada" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ProceedsForDepositsForAssetsHeldForSale" abstract="false" name="ProceedsForDepositsForAssetsHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_MineralPropertiesDomain" abstract="false" name="MineralPropertiesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_InventoryOfOreInStockpiles" abstract="false" name="InventoryOfOreInStockpiles" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_NumberOfPurchaseAgreements" abstract="false" name="NumberOfPurchaseAgreements" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="efr_RevenuesUraniumConcentrates" abstract="false" name="RevenuesUraniumConcentrates" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_SharesIssuedforConsultingServices" abstract="false" name="SharesIssuedforConsultingServices" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_ArkoseMiningVentureMember" abstract="true" name="ArkoseMiningVentureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_UnrecognizedCompensationCostsRelatedToUnvestedStockOptions" abstract="false" name="UnrecognizedCompensationCostsRelatedToUnvestedStockOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ProceedsFromIssuanceOfCommonStockAndWarrants" abstract="false" name="ProceedsFromIssuanceOfCommonStockAndWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_NonoperatingAssetsPolicyPolicyTextBlock" abstract="false" name="NonoperatingAssetsPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="efr_CostofRevenueApplicableToVanadiumConcentrates" abstract="false" name="CostofRevenueApplicableToVanadiumConcentrates" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_SharesIssuedForCashByAtTheMarketOffering" abstract="false" name="SharesIssuedForCashByAtTheMarketOffering" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ConvertibleNoteReceivableUnpaidAccruedInterest" abstract="false" name="ConvertibleNoteReceivableUnpaidAccruedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_NumberofNoteReceivables" abstract="false" name="NumberofNoteReceivables" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="efr_DisposalGroupPaymentReceivableAxis" abstract="true" name="DisposalGroupPaymentReceivableAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="efr_DisposalGroupPaymentReceivableDomain" abstract="true" name="DisposalGroupPaymentReceivableDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_PurchaseAgreementDirectDealCosts" abstract="false" name="PurchaseAgreementDirectDealCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_SharebasedCompensationArrangementbySharebasedPaymentAwardPeriodOfExercisePrice" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardPeriodOfExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="efr_NonCapitalLossCarryforwardMember" abstract="true" name="NonCapitalLossCarryforwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_CanyonProjectMember" abstract="false" name="CanyonProjectMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_StockIncentivePlanMember" abstract="true" name="StockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_ProceedsFromConvertibleNoteReceivable" abstract="false" name="ProceedsFromConvertibleNoteReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_EquitySecuritiesFVNIGrossUnrealizedLoss" abstract="false" name="EquitySecuritiesFVNIGrossUnrealizedLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_AltaMesaMember" abstract="false" name="AltaMesaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_AccruedPropertyTaxes" abstract="false" name="AccruedPropertyTaxes" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ReceivablesNet" abstract="false" name="ReceivablesNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantedNonvestedNumberOfShares" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardGrantedNonvestedNumberOfShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="efr_NonIncentiveStockOptionsMember" abstract="true" name="NonIncentiveStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodIntrinsicValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodIntrinsicValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_DisposalGroupProductionPaymentCommitment" abstract="false" name="DisposalGroupProductionPaymentCommitment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_CostofRevenueUraniumConcentrates" abstract="false" name="CostofRevenueUraniumConcentrates" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_AccountsReceivableBenchmarkMember" abstract="true" name="AccountsReceivableBenchmarkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_StockIssuedDuringPeriodSharesStockAppreciationRights" abstract="false" name="StockIssuedDuringPeriodSharesStockAppreciationRights" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_BusinessCombinationNumberOfCommonStockSharesAcquired" abstract="false" name="BusinessCombinationNumberOfCommonStockSharesAcquired" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_ReleaseOfRestrictedCash" abstract="false" name="ReleaseOfRestrictedCash" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_PurchaseAgreementDepositPayment" abstract="false" name="PurchaseAgreementDepositPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_StockIssuedDuringPeriodSharesStockAppreciationRightsVested" abstract="false" name="StockIssuedDuringPeriodSharesStockAppreciationRightsVested" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_TateTransitionMetalsLtdMember" abstract="true" name="TateTransitionMetalsLtdMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_ShareBasedCompensationTransactionDomain" abstract="true" name="ShareBasedCompensationTransactionDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_DebtSecuritiesTradingAndEquityAccumulatedGrossUnrealizedGainBeforeTax" abstract="false" name="DebtSecuritiesTradingAndEquityAccumulatedGrossUnrealizedGainBeforeTax" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_IsoEnergyLtd.Member" abstract="true" name="IsoEnergyLtd.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_CURMember" abstract="true" name="CURMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_NumberOfSubsidiariesSold" abstract="false" name="NumberOfSubsidiariesSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="efr_StockAppreciationRightsNonVestedMember" abstract="true" name="StockAppreciationRightsNonVestedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_Post2017NetOperatingLossesMember" abstract="true" name="Post2017NetOperatingLossesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_DepartmentOfEnergyAward" abstract="false" name="DepartmentOfEnergyAward" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_PaymentTaxWithholdingShareBasedPaymentArrangementDueUponExerciseOfAward" abstract="false" name="PaymentTaxWithholdingShareBasedPaymentArrangementDueUponExerciseOfAward" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare" abstract="false" name="BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableEntitySharesIssuedPerAcquireeShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="efr_DebtSecuritiesFVNIGainLoss" abstract="false" name="DebtSecuritiesFVNIGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_UnitedNuclearMember" abstract="true" name="UnitedNuclearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="efr_ConvertibleNoteReceivableSalesCommission" abstract="false" name="ConvertibleNoteReceivableSalesCommission" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_DisposalGroupCashToBeReceived" abstract="false" name="DisposalGroupCashToBeReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="efr_InflationRate" abstract="false" name="InflationRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="efr_ScheduleofAssetRetirementObligationsTable" abstract="true" name="ScheduleofAssetRetirementObligationsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="efr_ConsolidatedUraniumInc.AndVirginiaEnergyMember" abstract="true" name="ConsolidatedUraniumInc.AndVirginiaEnergyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="efr_Customer5Member" abstract="true" name="Customer5Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
