Materials Data on Li3Co2(PO4)3 by Materials Project
Li3Co2(PO4)3 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. Li1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of Li–O bond distances ranging from 1.92–2.15 Å. There are two inequivalent Co3+ sites. In the first Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with six equivalent PO4 tetrahedra. There are three shorter (1.93 Å) and three longer (2.11 Å) Co–O bond lengths. In the second Co3+ site, Co3+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with six equivalent PO4 tetrahedra. There is three shorter (1.94 Å) and three longer (1.97 Å) Co–O bond length. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four CoO6 octahedra. The corner-sharing octahedra tilt angles range from 29–48°. There are a spread of P–O bond distances ranging from 1.52–1.59 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Li1+, one Co3+, and one P5+ atom to form distorted corner-sharing OLi2CoP tetrahedra. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Co3+, and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one Li1+, one Co3+, and one P5+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to one Co3+ and one P5+ atom.