Materials Data on Li3MnFe3O8 by Materials Project
Li3MnFe3O8 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six equivalent MnO6 octahedra, edges with four LiO6 octahedra, and edges with six FeO6 octahedra. The corner-sharing octahedra tilt angles range from 9–13°. There are a spread of Li–O bond distances ranging from 2.10–2.32 Å. In the second Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six equivalent FeO6 octahedra, edges with two equivalent MnO6 octahedra, edges with four LiO6 octahedra, and edges with four FeO6 octahedra. The corner-sharing octahedra tilt angles range from 8–15°. There are a spread of Li–O bond distances ranging from 2.07–2.23 Å. In the third Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six equivalent FeO6 octahedra, edges with two equivalent MnO6 octahedra, edges with four LiO6 octahedra, and edges with four FeO6 octahedra. The corner-sharing octahedra tilt angles range from 7–14°. There are four shorter (2.22 Å) and two longer (2.27 Å) Li–O bond lengths. Mn4+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six equivalent LiO6 octahedra, edges with four LiO6 octahedra, and edges with six FeO6 octahedra. The corner-sharing octahedra tilt angles range from 9–13°. There are a spread of Mn–O bond distances ranging from 1.87–2.27 Å. There are three inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six equivalent LiO6 octahedra, edges with two equivalent MnO6 octahedra, edges with four LiO6 octahedra, and edges with four FeO6 octahedra. The corner-sharing octahedra tilt angles range from 8–15°. There are a spread of Fe–O bond distances ranging from 1.97–2.31 Å. In the second Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six equivalent LiO6 octahedra, edges with two equivalent MnO6 octahedra, edges with four LiO6 octahedra, and edges with four FeO6 octahedra. The corner-sharing octahedra tilt angles range from 7–14°. There are a spread of Fe–O bond distances ranging from 1.94–2.13 Å. In the third Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share edges with two equivalent MnO6 octahedra, edges with four FeO6 octahedra, and edges with six LiO6 octahedra. There are a spread of Fe–O bond distances ranging from 1.89–2.28 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to two Li1+, one Mn4+, and two Fe3+ atoms to form distorted OLi2MnFe2 square pyramids that share corners with nine OLi2MnFe2 square pyramids, edges with four equivalent OLi3MnFe2 octahedra, and edges with four OLi2MnFe2 square pyramids. In the second O2- site, O2- is bonded to two Li1+, one Mn4+, and two Fe3+ atoms to form OLi2MnFe2 square pyramids that share corners with nine OLi2MnFe2 square pyramids, edges with four equivalent OLi3MnFe2 octahedra, and edges with four OLi2Fe3 square pyramids. In the third O2- site, O2- is bonded to three Li1+, one Mn4+, and two Fe3+ atoms to form distorted OLi3MnFe2 octahedra that share corners with six equivalent OLi3MnFe2 octahedra and edges with twelve OLi2MnFe2 square pyramids. The corner-sharing octahedral tilt angles are 0°. In the fourth O2- site, O2- is bonded to two Li1+ and three Fe3+ atoms to form OLi2Fe3 square pyramids that share corners with nine OLi2MnFe2 square pyramids, edges with four equivalent OLi3MnFe2 octahedra, and edges with four OLi2MnFe2 square pyramids.