Acta Cryst. (2009). E65, i69  [ doi:10.1107/S1600536809033133 ]

K_1.65V_1.78W_0.22O₂(AsO₄)₂

S. Belkhiri, M. Kars and D. Mezaoui

Abstract: The title potassium vanadium tungsten bis(arsenate oxide) was synthesized by a solid-state reaction at 973 K. The crystal structure is isotypic with KVOPO₄ and contains a [MVAs₂O₁₀] framework built up from single MO₆ (M = V+W) octahedra sharing corners with single VO₆ octahedra and AsO₄ tetrahedra. This structure shows the existence of infinite [VAsO₈] and [MAsO₈] chains running along the a and c directions, respectively. All atoms are located on general positions. The metal position M is statistically occupied by 78% V and 22% W.

Online 29 août 2009

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