Acta Cryst. (2009). E65, i60  [ doi:10.1107/S1600536809026579 ]

Rietveld refinement of Y₂GeO₅

E. M. Rivera-Muñoz and L. Bucio

Abstract: Y₂GeO₅ (yttrium germanium pentaoxide) was synthesized by solid-state reaction at 1443 K. The arrangement, which has monoclinic symmetry, is isostructural with Dy₂GeO₅ and presents two independent sites for the Y atoms. Around these atoms there are distorted six-coordinated YO₆ octahedra and seven-coordinated YO₇ pentagonal bipyramids. The YO₇ polyhedra are linked together, sharing their edges along a surface parallel to ab, forming a sheet. Each of these parallel sheets is interconnected by means of GeO₄ tetrahedra, sharing an edge (or vertex) on one side and a vertex (or edge) on the other adjacent side. Parallel sheets of YO₇ polyhedra are also interconnected by undulating chains of YO₆ octahedra along the c axis. These octahedra are joined together, sharing a common edge, to form the chain and share edges with the YO₇ polyhedra of the sheets.

Online 15 July 2009

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