Silver indium diphosphate, AgInP2O7

Abstract

Polycrystalline material of the title compound, AgInP2O 7, was synthesized by traditional high-temperature solid-state methods and single crystals were grown from the melt of a mixture of AgInP 2O7 and B2O3 as flux in a platinium crucible. The structure consists of InO6 octahedra, which are cornershared to PO4 tetrahedra into a three-dimensional network with hexagonal channels running parallel to the c axis. The silver cation, located in the channel, is bonded to seven O atoms of the [InP2O7] framework with Ag-O distances ranging from 2.370 (2) to 3.015 (2) Å. The P2O7 diphosphate anion is characterized by a P - O - P angle of 137.27 (9) and a nearly eclipsed conformation. AgInP2O 7 is isotypic with the MIFeP2O7 (MI = Na, K, Rb, Cs and Ag) diphosphate family.