Compounds of uranium with the transition metals of the first long period

In the alloy systems of uranium with M_u, Fe, Co and l~i, the following compounds occur: U6Mn, U6Fe, UsCo and U61~i , all tetragonal and isostructural, and of a new structural type; UCo, a bodycentered cubic compoLmd, Z--8, with a unique structure; UNi, structure undetermined; UM_u~, UF% and UCo~, with the C-15 structure; UNi2, with the C-14 structure; UNi 5 with the PdB% structure, closely related to the G-15 structure. In addition, UCu 5 has a similar structure. Lattice constants and full structure determinations are reported for all compounds except UNi. For the latter, only powder data have been available, and the structure is complex.