EUPDGE - A NEW GERMANIDE WITH EUNIGE TYPE-STRUCTURE

The title compound was prepared from the elemental components in a tan talum tube at 1070 K and investigated by X-ray diffraction of both pow der as well as single crystals. The crystal structure was refined from four-circle diffractometer data: P2(1)/n, a = 618.1(1), b = 613.6(1), c = 743.9(1) pm, beta = 109.40(1)degrees, V = 0.2661(1) nm(3), Z = 4, wR2 = 0.0536 for 1564 F-2 values and 29 variables. EuPdGe crystallize s with the EuNiGe type structure. Both Pd and Ge atoms in EuPdGe have three germanium or palladium neighbors, respectively. They form two-di mensionally infinite [PdGe] polyanions which consist of corrugated 4.8 (2) nets. These polyanions are separated by the europium atoms.