Acta Cryst. (2003). E59, i1-i3  [ doi:10.1107/S1600536802023541 ]

Orthorhombic Yb₅Si₄ from synchrotron powder data

R. Cerný and K. Alami-Yadri

Abstract: Orthorhombic Yb₅Si₄ (pentaytterbium tetrasilicide) crystallizes with the structure type Sm₅Ge₄. However, the two compounds differ in the coordination of some Si (Ge) atoms. Each Si atom in the structure of Yb₅Si₄ forms one covalent bond with another Si atom (Si-Si distances of 2.45-2.47  Å), in contrast to Sm₅Ge₄, where only half of the Ge atoms are covalently bonded to another Ge atom (Ge-Ge distance of 2.658  Å).

Online 10 January 2003

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