Acta Cryst. (2005). E61, i73-i75  [ doi:10.1107/S160053680501113X ]

Ce₅Au_xGe_4-x [x = 0.43 (2)] with the orthorhombic Sm₅Ge₄ structure type

S. Bobev and E. D. Bauer

Abstract: Single crystals of the title compound, pentacerium gold tetragermanium, were synthesized from the corresponding elements using a eutectic Au/Ge mixture as solvent. Structure determination of a crystal from that reaction revealed the composition Ce₅Au_xGe_4-x (x = 0.43). The compound is a new ternary derivative of the Sm₅Ge₄ structure type that crystallizes in the space group Pnma of the orthorhombic system. There are six atoms in the asymmetric unit, one Ce in Wyckoff site 4c, two Ce in 8d, two Ge in 4c and one Ge in 8d. Two of the Ge sites are statistically occupied by Ge and Au atoms, with a lack of long-range ordering. The results are consistent with an earlier report on the structure of the fully stoichiometric analog Ce₅Ge₄.

Online 16 April 2005

Copyright © International Union of Crystallography
IUCr Webmaster