DOI: 10.17188/1683184
title: Materials Data on Fe5(OF4)2 by Materials Project

description: Fe5(OF4)2 is Hydrophilite-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are six inequivalent Fe+2.40+ sites. In the first Fe+2.40+ site, Fe+2.40+ is bonded to two equivalent O2- and four F1- atoms to form FeO2F4 octahedra that share corners with eight FeO2F4 octahedra and edges with two equivalent FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 40–60°. Both Fe–O bond lengths are 1.97 Å. All Fe–F bond lengths are 2.08 Å. In the second Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 43–55°. The Fe–O bond length is 2.05 Å. There are a spread of Fe–F bond distances ranging from 2.06–2.21 Å. In the third Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 43–59°. The Fe–O bond length is 2.04 Å. There are a spread of Fe–F bond distances ranging from 2.04–2.20 Å. In the fourth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 46–55°. The Fe–O bond length is 1.82 Å. There are a spread of Fe–F bond distances ranging from 2.00–2.10 Å. In the fifth Fe+2.40+ site, Fe+2.40+ is bonded to one O2- and five F1- atoms to form a mixture of distorted edge and corner-sharing FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 43–60°. The Fe–O bond length is 2.09 Å. There are a spread of Fe–F bond distances ranging from 2.01–2.36 Å. In the sixth Fe+2.40+ site, Fe+2.40+ is bonded to two equivalent O2- and four F1- atoms to form FeO2F4 octahedra that share corners with eight FeO2F4 octahedra and edges with two equivalent FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 40–52°. Both Fe–O bond lengths are 1.97 Å. There are two shorter (2.02 Å) and two longer (2.08 Å) Fe–F bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. There are eight inequivalent F1- sites. In the first F1- site, F1- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. In the second F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the third F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the fourth F1- site, F1- is bonded in a trigonal planar geometry to three Fe+2.40+ atoms. In the fifth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the sixth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the seventh F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms. In the eighth F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.40+ atoms.