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

Acta Crystallographica Section E: Crystallographic Communications

Mohamed Saadi¹  Ahmed Ould Saleck¹  Lahcen El Ammari¹  Abderrazzak Assani¹  Cyrille Mercier²  Claudine Follet² 

[1] Laboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V, Avenue Ibn Battouta, BP 1014, Rabat, Morocco;Laboratoire des Matériaux Céramiques et Procédés Associés, EA2443, Université de Valenciennes et du Hainaut-Cambrésis, Boulevard Charles de Gaulle, BP 59600, Maubeuge, France;

关键词: crystal structure;    transition metal phosphates;    alluaudite structure type;    hydrothermal synthesis;    hydrogen bonding;   

DOI  :  10.1107/S205698901501155X

来源: DOAJ

【 摘 要 】

The title compound, sodium trimagnesium bis(hydrogen phosphate) phosphate, was obtained under hydrothermal conditions. In the crystal, two types of [MgO6] octahedra, 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 tetrahedra, 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 tetrahedron points into the other type of channel and exhibits a strong hydrogen bond to an O atom of the PO4 tetrahedron on the opposite side.

【 授权许可】

Unknown