Materials Data on Fe5O7F3 by Materials Project

Abstract

Fe5O7F3 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pmn2_1 space group. The structure is three-dimensional. there are three inequivalent Fe sites. In the first Fe site, Fe is bonded to four O and two equivalent F atoms to form FeO4F2 octahedra that share corners with eight FeO4F2 octahedra and edges with two FeO5F octahedra. The corner-sharing octahedra tilt angles range from 46–58°. There is three shorter (1.95 Å) and one longer (1.97 Å) Fe–O bond length. Both Fe–F bond lengths are 2.12 Å. In the second Fe site, Fe is bonded to five O and one F atom to form a mixture of corner and edge-sharing FeO5F octahedra. The corner-sharing octahedra tilt angles range from 46–53°. All Fe–O bond lengths are 1.96 Å. The Fe–F bond length is 2.11 Å. In the third Fe site, Fe is bonded to four O and two F atoms to form a mixture of corner and edge-sharing FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 46–58°. There are a spread of Fe–O bond distances ranging from 1.91–2.03 Å. There are one shorter (2.08 Å) and one longer (2.10 Å) Fe–F bond lengths. There are four inequivalent O sites. In the first O site, O is bonded in a distorted trigonal planar geometry to three Fe atoms. In the second O site, O is bonded in a trigonal planar geometry to three Fe atoms. In the third O site, O is bonded in a trigonal planar geometry to three Fe atoms. In the fourth O site, O is bonded in a distorted trigonal planar geometry to three Fe atoms. There are two inequivalent F sites. In the first F site, F is bonded in a distorted trigonal planar geometry to three Fe atoms. In the second F site, F is bonded in a distorted trigonal planar geometry to three Fe atoms.