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The alluaudite-like arsenate NaCaMg(3)(AsO(4))(3).

ABSTRACT: The title compound, sodium calcium trimagnesium tris-(arsenate), an alluaudite-like arsenate, was prepared by solid-state reaction at high temperature. The structure is built up from edge-sharing MgO(6) octa-hedra in chains associated with the AsO(4) arsenate groups. The three-dimensional network leads to two different tunnels occupied statistically by Na(+) and Ca(2+). One As and one Mg atom lie on twofold rotation axes; one Na and one Ca are disordered over two sites with occupancies of 0.7 and 0.3 and these sites lie on a twofold rotation axis and an inversion centre, respectively.

SUBMITTER: Haj Abdallah A

PROVIDER: S-EPMC2961449 | biostudies-literature | 2008 May

REPOSITORIES: biostudies-literature

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The alluaudite-like arsenate NaCaMg(3)(AsO(4))(3).

Haj Abdallah Anissa A Haddad Amor A

Acta crystallographica. Section E, Structure reports online 20080521 Pt 6

The title compound, sodium calcium trimagnesium tris-(arsenate), an alluaudite-like arsenate, was prepared by solid-state reaction at high temperature. The structure is built up from edge-sharing MgO(6) octa-hedra in chains associated with the AsO(4) arsenate groups. The three-dimensional network leads to two different tunnels occupied statistically by Na(+) and Ca(2+). One As and one Mg atom lie on twofold rotation axes; one Na and one Ca are disordered over two sites with occupancies of 0.7 an ...[more]

PMID: 21202438

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A sodium calcium arsenate, NaCa(AsO(4)).

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