Crystal structures of new silver ion conductors Ag7Fe3(X2O7)4 (X = P, As)†
Abstract
The crystal structures of new Ag7Fe3(X2O7)4 (X = P, As) compounds, prepared through ion exchange from their sodium analogs, are reported. They adopt the monoclinic crystal system and exhibit an Ag ordering on cooling evidenced by a lowering of the symmetry from C-centered to primitive Bravais lattices. Crystal structures were determined from