Acta Cryst. (2007). E63, i133-i135  [ doi:10.1107/S1600536807018922 ]

Y₂TeO₆ with the La₂TeO₆-type structure

P. Höss and T. Schleid

Abstract: Of rare-earth metal hexaoxotellurates(VI), only the structures of formula type RE₂TeO₆ are known so far. Diyttrium(III) hexaoxotellurate(VI), Y₂TeO₆, crystallizes isotypically with the orthorhombic La₂TeO₆-prototype structure in space group P2₁2₁2₁. Single crystals were obtained by fusing a mixture of Y₂O₃ and TeO₃ (1:1 molar ratio) in evacuated silica ampoules. The crystal structure is built up by alternating zigzag chains of edge-sharing [Y1O₇] and vertex-sharing [Y2O₇] polyhedra. Both chain types are arranged in interpenetrating tetragonal rod-packings and are joined to each other by sharing common edges and vertices. The three-dimensional [Y₂O₆]^6- framework has channels along [100] in which the Te⁶⁺ cations reside, leading to discrete [TeO₆] octahedra.

Online 25 April 2007

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