Materials Data on Fe3(O2F)2 by Materials Project

Abstract

Fe3(O2F)2 is Hydrophilite-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two 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 46–55°. There is two shorter (1.90 Å) and two longer (1.97 Å) Fe–O bond length. Both Fe–F bond lengths are 2.08 Å. In the second 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 45–55°. There is two shorter (1.96 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. There are two 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. F is bonded in a distorted trigonal planar geometry to three Fe atoms.