Materials Data on LiCrP2S7 by Materials Project
LiCrP2S7 crystallizes in the monoclinic C2 space group. The structure is three-dimensional. Li1+ is bonded in a distorted bent 150 degrees geometry to two equivalent S2- atoms. Both Li–S bond lengths are 3.03 Å. Cr3+ is bonded to six S2- atoms to form CrS6 octahedra that share corners with two equivalent PS4 tetrahedra and edges with two equivalent PS4 tetrahedra. There are a spread of Cr–S bond distances ranging from 2.40–2.48 Å. P5+ is bonded to four S2- atoms to form PS4 tetrahedra that share a cornercorner with one CrS6 octahedra, a cornercorner with one PS4 tetrahedra, and an edgeedge with one CrS6 octahedra. The corner-sharing octahedral tilt angles are 66°. There are a spread of P–S bond distances ranging from 2.03–2.15 Å. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded in an L-shaped geometry to one Cr3+ and one P5+ atom. In the second S2- site, S2- is bonded in a distorted trigonal non-coplanar geometry to one Li1+, one Cr3+, and one P5+ atom. In the third S2- site, S2- is bonded in an L-shaped geometry to one Cr3+ and one P5+ atom. In the fourth S2- site, S2- is bonded in a bent 120 degrees geometry to two equivalent P5+ atoms.