DOI: 10.17188/1709515
title: Materials Data on Li3FeOF3 by Materials Project

description: Li3FeOF3 is Caswellsilverite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are six inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six F1- atoms to form LiF6 octahedra that share corners with six LiF6 octahedra, edges with two equivalent FeO3F3 octahedra, and edges with ten LiF6 octahedra. The corner-sharing octahedra tilt angles range from 1–4°. There are a spread of Li–F bond distances ranging from 2.01–2.11 Å. In the second Li1+ site, Li1+ is bonded to six F1- atoms to form LiF6 octahedra that share corners with two FeO3F3 octahedra, corners with four LiF6 octahedra, and edges with twelve LiF6 octahedra. The corner-sharing octahedra tilt angles range from 2–6°. There are a spread of Li–F bond distances ranging from 2.01–2.11 Å. In the third Li1+ site, Li1+ is bonded to four O2- and two F1- atoms to form LiO4F2 octahedra that share corners with two LiF6 octahedra, corners with four FeO3F3 octahedra, edges with six LiO4F2 octahedra, and edges with six FeO3F3 octahedra. The corner-sharing octahedra tilt angles range from 2–5°. All Li–O bond lengths are 2.10 Å. There are one shorter (2.27 Å) and one longer (2.29 Å) Li–F bond lengths. In the fourth Li1+ site, Li1+ is bonded to one O2- and five F1- atoms to form LiOF5 octahedra that share corners with three LiF6 octahedra, corners with three FeO3F3 octahedra, edges with three equivalent FeO3F3 octahedra, and edges with nine LiF6 octahedra. The corner-sharing octahedra tilt angles range from 1–11°. The Li–O bond length is 2.03 Å. There are a spread of Li–F bond distances ranging from 2.09–2.15 Å. In the fifth Li1+ site, Li1+ is bonded to six F1- atoms to form LiF6 octahedra that share corners with six LiF6 octahedra, edges with two equivalent FeO3F3 octahedra, and edges with ten LiF6 octahedra. The corner-sharing octahedra tilt angles range from 1–4°. There are a spread of Li–F bond distances ranging from 2.01–2.10 Å. In the sixth Li1+ site, Li1+ is bonded to one O2- and five F1- atoms to form LiOF5 octahedra that share corners with three LiF6 octahedra, corners with three FeO3F3 octahedra, edges with three equivalent FeO3F3 octahedra, and edges with nine LiF6 octahedra. The corner-sharing octahedra tilt angles range from 1–11°. The Li–O bond length is 2.03 Å. There are a spread of Li–F bond distances ranging from 2.09–2.15 Å. There are two inequivalent Fe2+ sites. In the first Fe2+ site, Fe2+ is bonded to three O2- and three F1- atoms to form FeO3F3 octahedra that share corners with six LiF6 octahedra, edges with four FeO3F3 octahedra, and edges with eight LiO4F2 octahedra. The corner-sharing octahedra tilt angles range from 4–11°. There are a spread of Fe–O bond distances ranging from 2.04–2.15 Å. There are one shorter (2.23 Å) and two longer (2.25 Å) Fe–F bond lengths. In the second Fe2+ site, Fe2+ is bonded to three O2- and three F1- atoms to form FeO3F3 octahedra that share corners with six LiF6 octahedra, edges with four FeO3F3 octahedra, and edges with eight LiF6 octahedra. The corner-sharing octahedra tilt angles range from 4–11°. There are a spread of Fe–O bond distances ranging from 2.04–2.15 Å. There are one shorter (2.23 Å) and two longer (2.25 Å) Fe–F bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to three Li1+ and three Fe2+ atoms to form OLi3Fe3 octahedra that share corners with two equivalent OLi3Fe3 octahedra, corners with four FLi5Fe octahedra, edges with five OLi3Fe3 octahedra, and edges with seven FLi4Fe2 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. In the second O2- site, O2- is bonded to three Li1+ and three Fe2+ atoms to form OLi3Fe3 octahedra that share corners with two equivalent OLi3Fe3 octahedra, corners with four FLi6 octahedra, edges with five OLi3Fe3 octahedra, and edges with seven FLi5Fe octahedra. The corner-sharing octahedra tilt angles range from 0–9°. There are six inequivalent F1- sites. In the first F1- site, F1- is bonded to six Li1+ atoms to form FLi6 octahedra that share a cornercorner with one OLi3Fe3 octahedra, corners with five FLi5Fe octahedra, and edges with twelve FLi6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. In the second F1- site, F1- is bonded to five Li1+ and one Fe2+ atom to form FLi5Fe octahedra that share a cornercorner with one OLi3Fe3 octahedra, corners with five FLi6 octahedra, edges with two equivalent OLi3Fe3 octahedra, and edges with ten FLi6 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. In the third F1- site, F1- is bonded to four Li1+ and two equivalent Fe2+ atoms to form FLi4Fe2 octahedra that share corners with two equivalent OLi3Fe3 octahedra, corners with four FLi6 octahedra, edges with five OLi3Fe3 octahedra, and edges with seven FLi4Fe2 octahedra. The corner-sharing octahedra tilt angles range from 0–9°. In the fourth F1- site, F1- is bonded to six Li1+ atoms to form FLi6 octahedra that share a cornercorner with one OLi3Fe3 octahedra, corners with five FLi6 octahedra, and edges with twelve FLi6 octahedra. The corner-sharing octahedra tilt angles range from 0–2°. In the fifth F1- site, F1- is bonded to five Li1+ and one Fe2+ atom to form FLi5Fe octahedra that share a cornercorner with one OLi3Fe3 octahedra, corners with five FLi5Fe octahedra, edges with two equivalent OLi3Fe3 octahedra, and edges with ten FLi6 octahedra. The corner-sharing octahedra tilt angles range from 0–8°. In the sixth F1- site, F1- is bonded to four Li1+ and two equivalent Fe2+ atoms to form FLi4Fe2 octahedra that share corners with two equivalent OLi3Fe3 octahedra, corners with four FLi5Fe octahedra, edges with five OLi3Fe3 octahedra, and edges with seven FLi6 octahedra. The corner-sharing octahedra tilt angles range from 0–9°.