Na_1.85Mg_1.85In_1.15(PO₄)₃ and Ag_1.69Mg_1.69In_1.31(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<

SUBMITTER: Ould Saleck A 

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

REPOSITORIES: biostudies-literature