Materials Data on LiMnPO5 by Materials Project
LiMnPO5 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Li1+ is bonded to six O2- atoms to form distorted LiO6 octahedra that share corners with two equivalent MnO6 octahedra, corners with four equivalent PO4 tetrahedra, edges with two equivalent LiO6 octahedra, and faces with two equivalent MnO6 octahedra. The corner-sharing octahedral tilt angles are 60°. There are two shorter (2.11 Å) and four longer (2.12 Å) Li–O bond lengths. Mn4+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with two equivalent LiO6 octahedra, corners with two equivalent MnO6 octahedra, corners with four equivalent PO4 tetrahedra, and faces with two equivalent LiO6 octahedra. The corner-sharing octahedra tilt angles range from 41–60°. There are a spread of Mn–O bond distances ranging from 1.86–2.01 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent LiO6 octahedra and corners with four equivalent MnO6 octahedra. The corner-sharing octahedra tilt angles range from 41–58°. There is one shorter (1.54 Å) and three longer (1.55 Å) P–O bond length. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Mn4+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li1+ and two equivalent Mn4+ atoms. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Mn4+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two equivalent Li1+, one Mn4+, and one P5+ atom.