Materials Data on LiCo2(PO4)2 by Materials Project
LiCo2(PO4)2 crystallizes in the monoclinic Pc space group. The structure is three-dimensional. Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with four CoO4 tetrahedra and corners with four PO4 tetrahedra. There are a spread of Li–O bond distances ranging from 2.03–2.08 Å. There are two inequivalent Co+2.50+ sites. In the first Co+2.50+ site, Co+2.50+ is bonded to four O2- atoms to form CoO4 tetrahedra that share corners with two equivalent LiO4 tetrahedra and corners with four PO4 tetrahedra. There is two shorter (1.83 Å) and two longer (1.91 Å) Co–O bond length. In the second Co+2.50+ site, Co+2.50+ is bonded to four O2- atoms to form CoO4 tetrahedra that share corners with two equivalent LiO4 tetrahedra and corners with four PO4 tetrahedra. There are a spread of Co–O bond distances ranging from 1.96–2.03 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent LiO4 tetrahedra and corners with four CoO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.52–1.59 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent LiO4 tetrahedra and corners with four CoO4 tetrahedra. There are a spread of P–O bond distances ranging from 1.52–1.59 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Co+2.50+ and one P5+ atom. In the second O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Co+2.50+, and one P5+ atom. In the third O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Co+2.50+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Co+2.50+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to one Co+2.50+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Co+2.50+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Co+2.50+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Co+2.50+ and one P5+ atom.