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  <xs:element id="nvriwi_OrionMetalsMiningMatterMember" abstract="true" name="OrionMetalsMiningMatterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvriwi_ShareBasedPaymentArrangementByShareBasedPaymentAwardPerformancePeriod" abstract="false" name="ShareBasedPaymentArrangementByShareBasedPaymentAwardPerformancePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="nvriwi_DirectEmployeesMember" abstract="true" name="DirectEmployeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="nvriwi_SharedEmployeesMember" abstract="true" name="SharedEmployeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
