Acta Cryst. (2012). E68, i54
[ doi:10.1107/S1600536812027183 ]

K₂V₂O₂(AsO₄)₂

S. Belkhiri, D. Mezaoui and T. Roisnel

Abstract: The vanadium oxide arsenate with formula K₂V₂O₂(AsO₄)₂, dipotassium divanadium(IV) dioxide diarsenate, has been synthesized by solid-state reaction in an evacuated silica ampoule. Its structure is isotypic with K₂V₂O₂(PO₄)₂. The framework is built up from corner-sharing VO₆ octahedra and AsO₄ tetrahedra, creating an infinite [VAsO₈] chain running along the a- and c-axis directions. The K⁺ cations are located in hexagonal tunnels, which are delimited by the connection of the [VAsO₈] chains.

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