Materials Data on Fe3(O2F)2 by Materials Project

Abstract

Fe3(O2F)2 is Hydrophilite-derived structured and crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are four inequivalent Fe sites. In the first Fe site, Fe is bonded to four O and two equivalent F atoms to form a mixture of edge and corner-sharing FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 48–58°. There is two shorter (1.94 Å) and two longer (2.04 Å) Fe–O bond length. Both Fe–F bond lengths are 2.12 Å. In the second Fe site, Fe is bonded to four O and two F atoms to form a mixture of edge and corner-sharing FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 47–58°. There is two shorter (1.95 Å) and two longer (1.99 Å) Fe–O bond length. There are one shorter (2.10 Å) and one longer (2.11 Å) Fe–F bond lengths. In the third Fe site, Fe is bonded to four O and two equivalent F atoms to form a mixture of edge and corner-sharing FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 47–48°. There are a spread of Fe–O bond distances ranging from 1.93–1.99 Å. Both Fe–F bond lengths are 2.07 Å. In the fourth Fe site, Fe is bonded to four O and two F atoms to form a mixture of edge and corner-sharing FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 47–54°. There are a spread of Fe–O bond distances ranging from 1.90–1.97 Å. There are one shorter (2.11 Å) and one longer (2.14 Å) Fe–F bond lengths. There are five 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. In the fifth O site, O is bonded in a 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.