LOCALIZATION OF THE 5F LEVEL ACROSS THE UM5-XTX SERIES

We review the results of bulk measurements on selected pseudoternary compounds within the UM5-xTx system where M = Cu, Ni and Pt, and T = Ag, Au, Pd and Ir. These ternary compounds crystallize in the cubic AuBe5 crystal structure. The results obtained on about 20 specimens clearly show that the 5f-localization of the uranium depends on the degree of f-d and/or f-s hybridization. The strength of the hybridization is a function of the concentration of s- and d-conduction electrons and is controlled chemically by the extent of the "M5-xTx" alloying. © 1990.