CRYSTAL-STRUCTURE OF THE COMPOUND CE7PD4GE2

The crystal structure of the compound Ce7PdGe2 has been determined by X-ray analysis of a single crystal (Dartch autodiffractometer, Mo Kalp ha radiation, 1116 independent reflections, reliability factor R=0.049 1 in the anisotropic approximation). This structure has been found to belong to a new structural type: space group P2(1)/n, a = 9.315(2) ang strom, b = 12.277(7) angstrom, c = 12.698(3) angstrom, beta = 114.31(2 )-degrees, Z = 4. The coordination polyhedra of the cerium atoms have 15 and 17 apexes, those of palladium are trigonal prisms with three ad ditional atoms and a tetragonal antiprism with one additional atom, an d those of germanium are trigonal prisms with three additional atoms.