LOCAL-STRUCTURE OF (U,ZR)PD-3 BY EXAFS

Measurements of the extended X-ray absorption fine structure (EXAFS) w ere used to determine the local configuration around uranium and zirco nium atoms in (U,Zr)Pd-3 solid solutions. Interatomic distances and la ttice constants from EXAFS and X-ray diffraction, respectively, are di scussed in relation to the effect of addition of ZrPd3 to UPd3. The de crease in U-Pd distance with ZrPd3 addition was appreciably smaller th an the average M-Pd (M = U, Zr) distance of the solutions. The result suggests that the 5-f localized electronic structure of UPd3 resists c ompression by the addition of ZrPd3. (C) 1998 Elsevier Science S.A.