Materials Data on Fe5(O4F)2 by Materials Project

Fe5(O4F)2 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 five O and one F atom to form a mixture of edge and corner-sharing FeO5F octahedra. The corner-sharing octahedra tilt angles range from 44–54°. There are a spread of Fe–O bond distances ranging from 1.93–2.03 Å. The Fe–F bond length is 2.11 Å. In the second Fe site, Fe is bonded to five O and one F atom to form a mixture of edge and corner-sharing FeO5F octahedra. The corner-sharing octahedra tilt angles range from 44–56°. There are a spread of Fe–O bond distances ranging from 1.95–1.97 Å. The Fe–F bond length is 2.09 Å. 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 47–56°. There is two shorter (1.92 Å) and two longer (2.03 Å) Fe–O bond length. Both Fe–F bond lengths are 2.05 Å. 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 distorted 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 distorted trigonal planar geometry to three Fe atoms. F is bonded in a distorted trigonal planar geometry to three Fe atoms.