DOI: 10.17188/1300357
title: Materials Data on Li8Mn12Ni4O31 by Materials Project

description: Li8Mn12Ni4O31 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eight inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with two NiO6 octahedra, corners with seven MnO6 octahedra, a cornercorner with one NiO5 square pyramid, and corners with two MnO5 square pyramids. The corner-sharing octahedra tilt angles range from 49–65°. There are a spread of Li–O bond distances ranging from 1.93–2.01 Å. In the second Li1+ site, Li1+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of Li–O bond distances ranging from 1.89–1.93 Å. In the third Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with two NiO6 octahedra, corners with eight MnO6 octahedra, a cornercorner with one MnO5 square pyramid, and a cornercorner with one NiO5 square pyramid. The corner-sharing octahedra tilt angles range from 55–66°. There is two shorter (1.98 Å) and two longer (2.00 Å) Li–O bond length. In the fourth Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with two NiO6 octahedra, corners with seven MnO6 octahedra, a cornercorner with one NiO5 square pyramid, and corners with two MnO5 square pyramids. The corner-sharing octahedra tilt angles range from 54–67°. There are a spread of Li–O bond distances ranging from 1.95–2.01 Å. In the fifth Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with three NiO6 octahedra and corners with nine MnO6 octahedra. The corner-sharing octahedra tilt angles range from 55–67°. There are a spread of Li–O bond distances ranging from 1.96–2.01 Å. In the sixth Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with three NiO6 octahedra, corners with seven MnO6 octahedra, and corners with two MnO5 square pyramids. The corner-sharing octahedra tilt angles range from 55–66°. There are a spread of Li–O bond distances ranging from 1.99–2.03 Å. In the seventh Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with two NiO6 octahedra, corners with eight MnO6 octahedra, a cornercorner with one MnO5 square pyramid, and a cornercorner with one NiO5 square pyramid. The corner-sharing octahedra tilt angles range from 56–66°. There are a spread of Li–O bond distances ranging from 1.98–2.01 Å. In the eighth Li1+ site, Li1+ is bonded to four O2- atoms to form LiO4 tetrahedra that share corners with two NiO6 octahedra, corners with seven MnO6 octahedra, a cornercorner with one NiO5 square pyramid, and corners with two MnO5 square pyramids. The corner-sharing octahedra tilt angles range from 54–67°. There are a spread of Li–O bond distances ranging from 1.98–2.01 Å. There are twelve inequivalent Mn+3.67+ sites. In the first Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with five LiO4 tetrahedra, an edgeedge with one NiO6 octahedra, edges with four MnO6 octahedra, and an edgeedge with one NiO5 square pyramid. There are a spread of Mn–O bond distances ranging from 1.91–1.97 Å. In the second Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with five LiO4 tetrahedra, edges with two NiO6 octahedra, edges with three MnO6 octahedra, and an edgeedge with one MnO5 square pyramid. There are a spread of Mn–O bond distances ranging from 1.86–1.98 Å. In the third Mn+3.67+ site, Mn+3.67+ is bonded to five O2- atoms to form MnO5 square pyramids that share a cornercorner with one MnO5 square pyramid, a cornercorner with one NiO5 square pyramid, corners with five LiO4 tetrahedra, an edgeedge with one NiO6 octahedra, and edges with three MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.91–2.05 Å. In the fourth Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with five LiO4 tetrahedra, an edgeedge with one NiO6 octahedra, edges with four MnO6 octahedra, and an edgeedge with one NiO5 square pyramid. There are a spread of Mn–O bond distances ranging from 1.90–1.96 Å. In the fifth Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with five LiO4 tetrahedra, an edgeedge with one NiO6 octahedra, edges with four MnO6 octahedra, and an edgeedge with one NiO5 square pyramid. There are a spread of Mn–O bond distances ranging from 1.90–1.97 Å. In the sixth Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with five LiO4 tetrahedra, edges with two NiO6 octahedra, edges with three MnO6 octahedra, and an edgeedge with one MnO5 square pyramid. There are a spread of Mn–O bond distances ranging from 1.90–1.97 Å. In the seventh Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six LiO4 tetrahedra, edges with two NiO6 octahedra, and edges with four MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.91–1.97 Å. In the eighth Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with five LiO4 tetrahedra, edges with two NiO6 octahedra, edges with three MnO6 octahedra, and an edgeedge with one MnO5 square pyramid. There are a spread of Mn–O bond distances ranging from 1.91–1.97 Å. In the ninth Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with five LiO4 tetrahedra, edges with two NiO6 octahedra, edges with three MnO6 octahedra, and an edgeedge with one MnO5 square pyramid. There are a spread of Mn–O bond distances ranging from 1.92–1.97 Å. In the tenth Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six LiO4 tetrahedra, edges with two NiO6 octahedra, and edges with four MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.91–1.97 Å. In the eleventh Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six LiO4 tetrahedra, an edgeedge with one NiO6 octahedra, edges with two MnO6 octahedra, an edgeedge with one NiO5 square pyramid, and edges with two MnO5 square pyramids. There are a spread of Mn–O bond distances ranging from 1.91–1.97 Å. In the twelfth Mn+3.67+ site, Mn+3.67+ is bonded to five O2- atoms to form MnO5 square pyramids that share a cornercorner with one MnO5 square pyramid, a cornercorner with one NiO5 square pyramid, corners with five LiO4 tetrahedra, an edgeedge with one NiO6 octahedra, and edges with three MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.92–2.07 Å. There are four inequivalent Ni+2.50+ sites. In the first Ni+2.50+ site, Ni+2.50+ is bonded to five O2- atoms to form NiO5 square pyramids that share corners with two MnO5 square pyramids, corners with five LiO4 tetrahedra, and edges with four MnO6 octahedra. There are a spread of Ni–O bond distances ranging from 1.99–2.06 Å. In the second Ni+2.50+ site, Ni+2.50+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with five LiO4 tetrahedra, edges with five MnO6 octahedra, and an edgeedge with one MnO5 square pyramid. There are a spread of Ni–O bond distances ranging from 2.06–2.10 Å. In the third Ni+2.50+ site, Ni+2.50+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with six LiO4 tetrahedra and edges with six MnO6 octahedra. There are one shorter (2.08 Å) and five longer (2.09 Å) Ni–O bond lengths. In the fourth Ni+2.50+ site, Ni+2.50+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with five LiO4 tetrahedra, edges with five MnO6 octahedra, and an edgeedge with one MnO5 square pyramid. There are three shorter (2.08 Å) and three longer (2.09 Å) Ni–O bond lengths. There are thirty-one inequivalent O2- sites. In the first O2- site, O2- is bonded to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom to form a mixture of distorted edge and corner-sharing OLiMn2Ni tetrahedra. In the second O2- site, O2- is bonded to one Li1+ and three Mn+3.67+ atoms to form distorted OLiMn3 trigonal pyramids that share a cornercorner with one OLiMn2Ni tetrahedra, corners with six OLiMn3 trigonal pyramids, and edges with two OLiMn2Ni trigonal pyramids. In the third O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the fourth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the fifth O2- site, O2- is bonded to one Li1+ and three Mn+3.67+ atoms to form distorted OLiMn3 trigonal pyramids that share corners with two OLiMn3 tetrahedra and corners with five OLiMn2Ni trigonal pyramids. In the sixth O2- site, O2- is bonded to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom to form distorted OLiMn2Ni trigonal pyramids that share corners with two OLiMn2Ni tetrahedra, corners with four OLiMn2Ni trigonal pyramids, and an edgeedge with one OLiMn3 trigonal pyramid. In the seventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the eighth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the ninth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the tenth O2- site, O2- is bonded to one Li1+ and three Mn+3.67+ atoms to form distorted OLiMn3 trigonal pyramids that share corners with four OLiMn3 trigonal pyramids and an edgeedge with one OLiMn2Ni trigonal pyramid. In the eleventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the twelfth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the thirteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Li1+ and three Mn+3.67+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the fifteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the sixteenth O2- site, O2- is bonded to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom to form distorted OLiMn2Ni trigonal pyramids that share a cornercorner with one OLiMn3 tetrahedra and corners with six OLiMn2Ni trigonal pyramids. In the seventeenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the eighteenth O2- site, O2- is bonded to one Li1+ and three Mn+3.67+ atoms to form distorted OLiMn3 trigonal pyramids that share a cornercorner with one OLiMn2Ni tetrahedra, corners with five OLiMn3 trigonal pyramids, and an edgeedge with one OLiMn2Ni trigonal pyramid. In the nineteenth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom. In the twentieth O2- site, O2- is bonded to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom to form distorted OLiMn2Ni trigonal pyramids that share a cornercorner with one OLiMn3 tetrahedra, corners with five OLiMn2Ni trigonal pyramids, and an edgeedge with one OLiMn3 trigonal pyramid. In the twenty-first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to one Li1+ and three Mn+3.67+ atoms. In the twenty-second O2- site, O2- is bonded to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom to form distorted OLiMn2Ni trigonal pyramids that share corners with three OLiMn2Ni tetrahedra, corners with three OLiMn2Ni trigonal pyramids, and edges with three OLiMn3 trigonal pyramids. In the twenty-third O2- site, O2- is bonded to one Li1+, two Mn+3.67+, and one Ni+2.50+ atom to form a