Materials Data on Co2O3F by Materials Project

Abstract

Co2O3F is zeta iron carbide-derived structured and crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are five inequivalent Co+3.50+ sites. In the first Co+3.50+ site, Co+3.50+ is bonded to four O2- and two F1- atoms to form CoO4F2 octahedra that share corners with eight CoO5F octahedra and edges with two CoO4F2 octahedra. The corner-sharing octahedra tilt angles range from 43–53°. There are a spread of Co–O bond distances ranging from 1.84–1.90 Å. There are one shorter (2.00 Å) and one longer (2.05 Å) Co–F bond lengths. In the second Co+3.50+ site, Co+3.50+ is bonded to four O2- and two F1- atoms to form CoO4F2 octahedra that share corners with eight CoO5F octahedra and edges with two CoO4F2 octahedra. The corner-sharing octahedra tilt angles range from 46–52°. There are a spread of Co–O bond distances ranging from 1.85–1.93 Å. Both Co–F bond lengths are 2.05 Å. In the third Co+3.50+ site, Co+3.50+ is bonded to five O2- and one F1- atom to form CoO5F octahedra that share corners with eight CoO4F2 octahedra and edges with two equivalent CoO5F octahedra. The corner-sharing octahedra tilt angles range from 48–51°. There is one shorter (1.77 Å) and four longer (1.89 Å) Co–O bond length. The Co–F bond length is 2.05 Å. In the fourth Co+3.50+ site, Co+3.50+ is bonded to five O2- and one F1- atom to form CoO5F octahedra that share corners with eight CoO4F2 octahedra and edges with two CoO5F octahedra. The corner-sharing octahedra tilt angles range from 43–53°. There are a spread of Co–O bond distances ranging from 1.79–1.91 Å. The Co–F bond length is 1.96 Å. In the fifth Co+3.50+ site, Co+3.50+ is bonded to five O2- and one F1- atom to form CoO5F octahedra that share corners with eight CoO4F2 octahedra and edges with two equivalent CoO5F octahedra. The corner-sharing octahedra tilt angles range from 46–52°. There are a spread of Co–O bond distances ranging from 1.77–1.91 Å. The Co–F bond length is 1.96 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to three Co+3.50+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to three Co+3.50+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to three Co+3.50+ atoms. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to three Co+3.50+ atoms. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to three Co+3.50+ atoms. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to three Co+3.50+ atoms. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to three Co+3.50+ atoms. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 3-coordinate geometry to three Co+3.50+ atoms. In the second F1- site, F1- is bonded in a 3-coordinate geometry to three Co+3.50+ atoms. In the third F1- site, F1- is bonded in a 3-coordinate geometry to three Co+3.50+ atoms.