Materials Data on FeAg3F6 by Materials Project

Abstract

FeAg3F6 is (Cubic) Perovskite-like structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Fe3+ is bonded to six equivalent F1- atoms to form FeF6 octahedra that share corners with six equivalent AgF6 octahedra and faces with eight equivalent AgF12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Fe–F bond lengths are 1.94 Å. There are two inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded to twelve equivalent F1- atoms to form AgF12 cuboctahedra that share corners with twelve equivalent AgF12 cuboctahedra, faces with six equivalent AgF12 cuboctahedra, faces with four equivalent FeF6 octahedra, and faces with four equivalent AgF6 octahedra. All Ag–F bond lengths are 3.04 Å. In the second Ag1+ site, Ag1+ is bonded to six equivalent F1- atoms to form AgF6 octahedra that share corners with six equivalent FeF6 octahedra and faces with eight equivalent AgF12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Ag–F bond lengths are 2.35 Å. F1- is bonded in a distorted linear geometry to one Fe3+ and five Ag1+ atoms.