Hexavalent Uranium Fluoride

Hexavalent Uranium Fluoride (UF6) is the only material that can be loaded into Gas Uranium Centrifuge. (Gives LEU after first loading and HEU after second loading). It can be obtained by loading Uranium Tetrafluoride and Fluorine into Environmental Furnace with a mixture of H2 and F2undefined. Or as a byproduct after isotope separation at Gas Uranium Centrifuge. But UF6 from the centrifuge will be 235U depleted, so it can't be used at centrifuge again.