DOI: 10.17188/1206182
title: Materials Data on Li4Ni7(PO4)6 by Materials Project

description: Li4Ni7(PO4)6 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are three inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of Li–O bond distances ranging from 1.96–2.67 Å. In the second Li1+ site, Li1+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Li–O bond distances ranging from 2.04–2.79 Å. In the third Li1+ site, Li1+ is bonded in a distorted square co-planar geometry to four O2- atoms. There are two shorter (2.19 Å) and two longer (2.24 Å) Li–O bond lengths. There are four inequivalent Ni2+ sites. In the first Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with four NiO6 octahedra and corners with six PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 61–63°. There are a spread of Ni–O bond distances ranging from 1.98–2.09 Å. In the second Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share a cornercorner with one NiO6 octahedra, corners with four PO4 tetrahedra, edges with three NiO6 octahedra, and an edgeedge with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 63°. There are a spread of Ni–O bond distances ranging from 2.04–2.18 Å. In the third Ni2+ site, Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share a cornercorner with one NiO6 octahedra, corners with four PO4 tetrahedra, edges with three NiO6 octahedra, and an edgeedge with one PO4 tetrahedra. The corner-sharing octahedral tilt angles are 61°. There are a spread of Ni–O bond distances ranging from 2.03–2.23 Å. In the fourth Ni2+ site, Ni2+ is bonded to six O2- atoms to form distorted NiO6 octahedra that share corners with two PO4 tetrahedra, edges with four NiO6 octahedra, and edges with two PO4 tetrahedra. There are a spread of Ni–O bond distances ranging from 1.99–2.32 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four NiO6 octahedra and edges with two NiO6 octahedra. The corner-sharing octahedra tilt angles range from 36–59°. 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 five NiO6 octahedra. The corner-sharing octahedra tilt angles range from 40–57°. There are a spread of P–O bond distances ranging from 1.51–1.58 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with five NiO6 octahedra. The corner-sharing octahedra tilt angles range from 37–58°. There are a spread of P–O bond distances ranging from 1.51–1.60 Å. In the fourth P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four NiO6 octahedra and edges with two NiO6 octahedra. The corner-sharing octahedra tilt angles range from 36–59°. There are a spread of P–O bond distances ranging from 1.52–1.59 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one Ni2+ and one P5+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ni2+, and one P5+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Ni2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Ni2+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ni2+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to one Li1+, one Ni2+, and one P5+ atom. In the seventh O2- site, O2- is bonded to one Li1+, two Ni2+, and one P5+ atom to form a mixture of distorted corner and edge-sharing OLiNi2P tetrahedra. In the eighth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to three Ni2+ and one P5+ atom. In the ninth O2- site, O2- is bonded to one Li1+, two Ni2+, and one P5+ atom to form a mixture of distorted corner and edge-sharing OLiNi2P tetrahedra. In the tenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Ni2+, and one P5+ atom. In the eleventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Ni2+, and one P5+ atom. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Li1+ and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to three Li1+ and one P5+ atom. In the fourteenth O2- site, O2- is bonded to one Li1+, two Ni2+, and one P5+ atom to form a mixture of distorted corner and edge-sharing OLiNi2P tetrahedra.