Materials Data on Fe3OF5 by Materials Project

Abstract

Fe3OF5 is zeta iron carbide-derived structured and crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are four inequivalent Fe+2.33+ sites. In the first Fe+2.33+ site, Fe+2.33+ is bonded to six F1- atoms to form FeF6 octahedra that share corners with eight FeO2F4 octahedra and edges with two FeF6 octahedra. The corner-sharing octahedra tilt angles range from 42–65°. There are a spread of Fe–F bond distances ranging from 2.01–2.14 Å. In the second Fe+2.33+ site, Fe+2.33+ is bonded to two equivalent O2- and four F1- atoms to form FeO2F4 octahedra that share corners with eight FeF6 octahedra and edges with two equivalent FeOF5 octahedra. The corner-sharing octahedra tilt angles range from 42–48°. Both Fe–O bond lengths are 1.95 Å. There are two shorter (2.04 Å) and two longer (2.08 Å) Fe–F bond lengths. In the third Fe+2.33+ site, Fe+2.33+ is bonded to one O2- and five F1- atoms to form FeOF5 octahedra that share corners with eight FeF6 octahedra and edges with two FeO2F4 octahedra. The corner-sharing octahedra tilt angles range from 42–65°. The Fe–O bond length is 2.02 Å. There are a spread of Fe–F bond distances ranging from 2.11–2.20 Å. In the fourth Fe+2.33+ site, Fe+2.33+ is bonded to two equivalent O2- and four equivalent F1- atoms to form FeO2F4 octahedra that share corners with eight FeO2F4 octahedra and edges with two equivalent FeF6 octahedra. The corner-sharing octahedra tilt angles range from 42–61°. Both Fe–O bond lengths are 1.97 Å. All Fe–F bond lengths are 2.04 Å. O2- is bonded in a distorted trigonal planar geometry to three Fe+2.33+ atoms. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.33+ atoms. In the second F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.33+ atoms. In the third F1- site, F1- is bonded in a distorted trigonal planar geometry to three Fe+2.33+ atoms. In the fourth F1- site, F1- is bonded in a 3-coordinate geometry to three Fe+2.33+ atoms.