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Na1.85Mg1.85In1.15(PO4)3 and Ag1.69Mg1.69In1.31(PO4)3 with alluaudite-type structures.

ABSTRACT: Single crystals of two new phosphates, sodium magnesium indium(III) tris-(orthophosphate) and silver magnesium indium(III) tris-(orthophosphate), were obtained from solid-state reactions. The two phosphates are isotypic and exhibit alluaudite-type structures. They are characterized by a cationic disorder of the Mg and In sites and a partial occupation of the Na and Ag sites, respectively. The structure of both phosphates is made up of chains of edge-sharing [(Mg,In)O6] octa-hedra extending parallel to [10]. Adjacent chains are linked by PO4 tetra-hedra to form a three-dimensional framework delimiting two types of channels parallel to [001] in which the monovalent cations are situated. The coordination numbers of the Na+ cations are 6 and 8, and for both Ag+ cations 6. The corresponding coordination spheres are considerably distorted.

SUBMITTER: Ould Saleck A 

PROVIDER: S-EPMC6127713 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Na<sub>1.85</sub>Mg<sub>1.85</sub>In<sub>1.15</sub>(PO<sub>4</sub>)<sub>3</sub> and Ag<sub>1.69</sub>Mg<sub>1.69</sub>In<sub>1.31</sub>(PO<sub>4</sub>)<sub>3</sub> with alluaudite-type structures.

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 20180824 Pt 9

Single crystals of two new phosphates, sodium magnesium indium(III) tris-(orthophosphate) and silver magnesium indium(III) tris-(orthophosphate), were obtained from solid-state reactions. The two phosphates are isotypic and exhibit alluaudite-type structures. They are characterized by a cationic disorder of the Mg and In sites and a partial occupation of the Na and Ag sites, respectively. The structure of both phosphates is made up of chains of edge-sharing [(Mg,In)O<sub>6</sub>] octa-hedra exte  ...[more]

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