Preparation of Uranium Carbide from Uranium Tetrafluoride

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  • Preparation of Uranium Nitrides from Uranium Tetrafluoride

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A method has been developed for preparing UN by two-step reaction using UF4. As aresult, the reaction of UF4 with Si and N2 has proved quite practical for obtaining U2N3. Itwas confirmed by chemical analysis and by X-ray diffraction analysis that single phase U2N3was obtained at reaction temperatures above 1, 200°C, and only 3% of the uranium was lost byevaporation even at 1, 200°C. In the second reaction, the dissociation of U2N3 to UN in vacuumtook place rapidly above 1, 050°C, at which temperatures single phase UN was obtained, possess-ing a lattice constant of 4.888 A.

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