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Crystal structure of alluaudite-type NaMg3(HPO4)2(PO4).

ABSTRACT: The title compound, sodium trimagnesium bis-(hydrogen phosphate) phosphate, was obtained under hydro-thermal conditions. In the crystal, two types of [MgO6] octa-hedra, one with point group symmetry 2, share edges to build chains extending parallel to [10-1]. These chains are linked together by two kinds of phosphate tetra-hedra, HPO4 and PO4, the latter with point group symmetry 2. The three-dimensional framework delimits two different types of channels extending along [001]. One channel hosts the Na(+) cations (site symmetry 2) surrounded by eight O atoms, with Na-O bond lengths varying between 2.2974 (13) and 2.922 (2) Å. The OH group of the HPO4 tetra-hedron points into the other type of channel and exhibits a strong hydrogen bond to an O atom of the PO4 tetra-hedron on the opposite side.

SUBMITTER: Ould Saleck A

PROVIDER: S-EPMC4518993 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature

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Crystal structure of alluaudite-type NaMg3(HPO4)2(PO4).

Ould Saleck Ahmed A Assani Abderrazzak A Saadi Mohamed M Mercier Cyrille C Follet Claudine C El Ammari Lahcen L

Acta crystallographica. Section E, Crystallographic communications 20150620 Pt 7

The title compound, sodium trimagnesium bis-(hydrogen phosphate) phosphate, was obtained under hydro-thermal conditions. In the crystal, two types of [MgO6] octa-hedra, one with point group symmetry 2, share edges to build chains extending parallel to [10-1]. These chains are linked together by two kinds of phosphate tetra-hedra, HPO4 and PO4, the latter with point group symmetry 2. The three-dimensional framework delimits two different types of channels extending along [001]. One channel hosts ...[more]

PMID: 26279874

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