Acta Cryst. (2004). E60, i77-i79  [ doi:10.1107/S1600536804012772 ]

NaMg₄(AsO₄)₃

H. A. Anissa, A. Brahim and H. Amor

Abstract: The title compound, sodium tetramagnesium tris(arsenate), was prepared by solid-state reaction at 1243 K. The structure is built up from edge-sharing MgO₆ octahedra associated with the AsO₄ arsenate groups. The three-dimensional network encloses cavities in which Na⁺ cations are located. This compound exhibits the NaMg₄(VO₄)₃ structure. The Na and one of the As atoms are on positions of symmetry and the remaining cations all lie on twofold axes.

Online 5 June 2004

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