Crystal structure of ternary compounds C3Fe2U2 and C5Fe2U3

Investigations of the alloys of the ternary system C-Fe-U, as well as the known ternary compound C2FeU there were found two new ternary compounds of the approximate compositions C3Fe2U2 and C5Fe2U3. The powder pattern of the compound C3Fe2U2 was taken in an RKU-86 camera in unfiltered KFeradiation. Calculations revealed that the compound C3Fe2U2 crystallizes in a body-centered cubic structure with unit-cell parameter 10.068 angstrom. Calculations confirmed that the compound C5Fe2U3 crystallizes in a tetragonal structure with parameters a = 5.007 angstrom and c = 5.084 angstrom