Li6FeNi9O20 crystallizes in the triclinic P-1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(8) atoms to form LiO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. In the second Li site, Li(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms to form LiO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the third Li site, Li(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form distorted LiO6 octahedra that share  a cornercorner with one Ni(5)O6 octahedra, corners with two equivalent Ni(1)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-17°. In the fourth Li site, Li(4) is bonded to one O(1), one O(10), one O(2), one O(5), one O(8), and one O(9) atom to form distorted LiO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with three equivalent Ni(4)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, and edges with two equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-19°. Fe(1) is bonded to two equivalent O(10), two equivalent O(4), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Li(4)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-18°. There are five inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(10), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form NiO6 octahedra that share  a cornercorner with one Li(1)O6 octahedra, corners with two equivalent Li(3)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-14°. In the second Ni site, Ni(2) is bonded to one O(3), one O(5), one O(7), one O(8), and two equivalent O(2) atoms to form NiO6 octahedra that share  a cornercorner with one Li(2)O6 octahedra, corners with two equivalent Li(4)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. In the third Ni site, Ni(3) is bonded to one O(2), one O(3), one O(4), one O(6), one O(7), and one O(9) atom to form NiO6 octahedra that share  a cornercorner with one Li(1)O6 octahedra, corners with three equivalent Li(3)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-17°. In the fourth Ni site, Ni(4) is bonded to one O(1), one O(10), one O(5), one O(6), one O(8), and one O(9) atom to form NiO6 octahedra that share  a cornercorner with one Li(2)O6 octahedra, corners with three equivalent Li(4)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, and edges with two equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-19°. In the fifth Ni site, Ni(5) is bonded to two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-17°. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(3), one Li(4), one Ni(4), and two equivalent Ni(1) atoms to form OLi3Ni3 octahedra that share  a cornercorner with one O(1)Li3Ni3 octahedra,  a cornercorner with one O(4)Li2FeNi2 square pyramid,  a cornercorner with one O(3)Li2Ni3 square pyramid, corners with two equivalent O(9)LiNi3 trigonal pyramids,  an edgeedge with one O(1)Li3Ni3 octahedra,  an edgeedge with one O(2)Li3Ni3 octahedra,  an edgeedge with one O(4)Li2FeNi2 square pyramid, edges with two equivalent O(3)Li2Ni3 square pyramids, edges with two equivalent O(5)Li2Ni3 square pyramids, and edges with two equivalent O(8)Li2Ni3 square pyramids. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to one Li(2), one Li(3), one Li(4), one Ni(3), and two equivalent Ni(2) atoms to form OLi3Ni3 octahedra that share  a cornercorner with one O(2)Li3Ni3 octahedra,  a cornercorner with one O(5)Li2Ni3 square pyramid,  a cornercorner with one O(8)Li2Ni3 square pyramid,  an edgeedge with one O(1)Li3Ni3 octahedra,  an edgeedge with one O(2)Li3Ni3 octahedra,  an edgeedge with one O(8)Li2Ni3 square pyramid, edges with two equivalent O(4)Li2FeNi2 square pyramids, edges with two equivalent O(3)Li2Ni3 square pyramids, edges with two equivalent O(5)Li2Ni3 square pyramids, and  an edgeedge with one O(9)LiNi3 trigonal pyramid. The corner-sharing octahedra are not tilted. In the third O site, O(3) is bonded to one Li(1), one Li(3), one Ni(1), one Ni(2), and one Ni(3) atom to form OLi2Ni3 square pyramids that share  a cornercorner with one O(1)Li3Ni3 octahedra,  a cornercorner with one O(4)Li2FeNi2 square pyramid,  a cornercorner with one O(3)Li2Ni3 square pyramid,  a cornercorner with one O(8)Li2Ni3 square pyramid,  a cornercorner with one O(9)LiNi3 trigonal pyramid, edges with two equivalent O(1)Li3Ni3 octahedra, edges with two equivalent O(2)Li3Ni3 octahedra,  an edgeedge with one O(4)Li2FeNi2 square pyramid,  an edgeedge with one O(5)Li2Ni3 square pyramid, and  an edgeedge with one O(8)Li2Ni3 square pyramid. The corner-sharing octahedral tilt angles are 6°. In the fourth O site, O(4) is bonded to one Li(2), one Li(3), one Fe(1), one Ni(1), and one Ni(3) atom to form OLi2FeNi2 square pyramids that share  a cornercorner with one O(1)Li3Ni3 octahedra,  a cornercorner with one O(3)Li2Ni3 square pyramid,  a cornercorner with one O(5)Li2Ni3 square pyramid, corners with two equivalent O(4)Li2FeNi2 square pyramids,  a cornercorner with one O(9)LiNi3 trigonal pyramid,  an edgeedge with one O(1)Li3Ni3 octahedra, edges with two equivalent O(2)Li3Ni3 octahedra,  an edgeedge with one O(3)Li2Ni3 square pyramid, and  an edgeedge with one O(5)Li2Ni3 square pyramid. The corner-sharing octahedral tilt angles are 2°. In the fifth O site, O(5) is bonded to one Li(2), one Li(4), one Ni(1), one Ni(2), and one Ni(4) atom to form OLi2Ni3 square pyramids that share  a cornercorner with one O(2)Li3Ni3 octahedra,  a cornercorner with one O(4)Li2FeNi2 square pyramid,  a cornercorner with one O(5)Li2Ni3 square pyramid,  a cornercorner with one O(8)Li2Ni3 square pyramid, corners with two equivalent O(9)LiNi3 trigonal pyramids, edges with two equivalent O(1)Li3Ni3 octahedra, edges with two equivalent O(2)Li3Ni3 octahedra,  an edgeedge with one O(4)Li2FeNi2 square pyramid,  an edgeedge with one O(3)Li2Ni3 square pyramid, and  an edgeedge with one O(8)Li2Ni3 square pyramid. The corner-sharing octahedral tilt angles are 5°. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(3), one Fe(1), one Ni(3), and one Ni(4) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Li(3), one Ni(2), one Ni(3), and one Ni(5) atom. In the eighth O site, O(8) is bonded to one Li(1), one Li(4), one Ni(2), one Ni(4), and one Ni(5) atom to form OLi2Ni3 square pyramids that share  a cornercorner with one O(2)Li3Ni3 octahedra,  a cornercorner with one O(3)Li2Ni3 square pyramid,  a cornercorner with one O(5)Li2Ni3 square pyramid, corners with two equivalent O(8)Li2Ni3 square pyramids,  an edgeedge with one O(2)Li3Ni3 octahedra, edges with two equivalent O(1)Li3Ni3 octahedra,  an edgeedge with one O(3)Li2Ni3 square pyramid,  an edgeedge with one O(5)Li2Ni3 square pyramid, and edges with two equivalent O(9)LiNi3 trigonal pyramids. The corner-sharing octahedral tilt angles are 2°. In the ninth O site, O(9) is bonded to one Li(4), one Ni(3), one Ni(4), and one Ni(5) atom to form OLiNi3 trigonal pyramids that share corners with two equivalent O(1)Li3Ni3 octahedra,  a cornercorner with one O(4)Li2FeNi2 square pyramid,  a cornercorner with one O(3)Li2Ni3 square pyramid, corners with two equivalent O(5)Li2Ni3 square pyramids,  a cornercorner with one O(9)LiNi3 trigonal pyramid,  an edgeedge with one O(2)Li3Ni3 octahedra, and edges with two equivalent O(8)Li2Ni3 square pyramids. The corner-sharing octahedral tilt angles range from 4-11°. In the tenth O site, O(10) is bonded in a see-saw-like geometry to one Li(4), one Fe(1), one Ni(1), and one Ni(4) atom.
Li6FeNi9O20 crystallizes in the triclinic P-1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(8) atoms to form LiO6 octahedra that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ni(3)O6 octahedra, corners with two equivalent Ni(5)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-13°. Both Li(1)-O(1) bond lengths are 2.09 Å. Both Li(1)-O(3) bond lengths are 2.15 Å. Both Li(1)-O(8) bond lengths are 2.11 Å. In the second Li site, Li(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms to form LiO6 octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with two equivalent Ni(4)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. Both Li(2)-O(2) bond lengths are 2.17 Å. Both Li(2)-O(4) bond lengths are 2.14 Å. Both Li(2)-O(5) bond lengths are 2.13 Å. In the third Li site, Li(3) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form distorted LiO6 octahedra that share  a cornercorner with one Ni(5)O6 octahedra, corners with two equivalent Ni(1)O6 octahedra, corners with three equivalent Ni(3)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-17°. The Li(3)-O(1) bond length is 2.31 Å. The Li(3)-O(2) bond length is 2.17 Å. The Li(3)-O(3) bond length is 2.10 Å. The Li(3)-O(4) bond length is 2.16 Å. The Li(3)-O(6) bond length is 2.01 Å. The Li(3)-O(7) bond length is 2.03 Å. In the fourth Li site, Li(4) is bonded to one O(1), one O(10), one O(2), one O(5), one O(8), and one O(9) atom to form distorted LiO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with two equivalent Ni(2)O6 octahedra, corners with three equivalent Ni(4)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, and edges with two equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-19°. The Li(4)-O(1) bond length is 2.21 Å. The Li(4)-O(10) bond length is 1.97 Å. The Li(4)-O(2) bond length is 2.36 Å. The Li(4)-O(5) bond length is 2.26 Å. The Li(4)-O(8) bond length is 2.13 Å. The Li(4)-O(9) bond length is 2.01 Å. Fe(1) is bonded to two equivalent O(10), two equivalent O(4), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Li(2)O6 octahedra, corners with two equivalent Li(4)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, edges with two equivalent Ni(1)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-18°. Both Fe(1)-O(10) bond lengths are 1.98 Å. Both Fe(1)-O(4) bond lengths are 2.03 Å. Both Fe(1)-O(6) bond lengths are 1.84 Å. There are five inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(10), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form NiO6 octahedra that share  a cornercorner with one Li(1)O6 octahedra, corners with two equivalent Li(3)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 5-14°. The Ni(1)-O(10) bond length is 1.92 Å. The Ni(1)-O(3) bond length is 1.98 Å. The Ni(1)-O(4) bond length is 1.88 Å. The Ni(1)-O(5) bond length is 1.92 Å. There is one shorter (1.87 Å) and one longer (1.98 Å) Ni(1)-O(1) bond length. In the second Ni site, Ni(2) is bonded to one O(3), one O(5), one O(7), one O(8), and two equivalent O(2) atoms to form NiO6 octahedra that share  a cornercorner with one Li(2)O6 octahedra, corners with two equivalent Li(4)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, edges with two equivalent Li(3)O6 octahedra, and edges with two equivalent Ni(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 7-13°. The Ni(2)-O(3) bond length is 1.88 Å. The Ni(2)-O(5) bond length is 1.88 Å. The Ni(2)-O(7) bond length is 1.87 Å. The Ni(2)-O(8) bond length is 1.86 Å. Both Ni(2)-O(2) bond lengths are 1.88 Å. In the third Ni site, Ni(3) is bonded to one O(2), one O(3), one O(4), one O(6), one O(7), and one O(9) atom to form NiO6 octahedra that share  a cornercorner with one Li(1)O6 octahedra, corners with three equivalent Li(3)O6 octahedra,  an edgeedge with one Li(2)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Ni(1)O6 octahedra,  an edgeedge with one Ni(4)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-17°. The Ni(3)-O(2) bond length is 2.09 Å. The Ni(3)-O(3) bond length is 1.91 Å. The Ni(3)-O(4) bond length is 1.94 Å. The Ni(3)-O(6) bond length is 2.09 Å. The Ni(3)-O(7) bond length is 1.88 Å. The Ni(3)-O(9) bond length is 1.87 Å. In the fourth Ni site, Ni(4) is bonded to one O(1), one O(10), one O(5), one O(6), one O(8), and one O(9) atom to form NiO6 octahedra that share  a cornercorner with one Li(2)O6 octahedra, corners with three equivalent Li(4)O6 octahedra,  an edgeedge with one Li(1)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra,  an edgeedge with one Li(4)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra,  an edgeedge with one Ni(2)O6 octahedra,  an edgeedge with one Ni(3)O6 octahedra,  an edgeedge with one Ni(5)O6 octahedra, and edges with two equivalent Ni(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 6-19°. The Ni(4)-O(1) bond length is 2.09 Å. The Ni(4)-O(10) bond length is 1.88 Å. The Ni(4)-O(5) bond length is 1.94 Å. The Ni(4)-O(6) bond length is 1.92 Å. The Ni(4)-O(8) bond length is 1.89 Å. The Ni(4)-O(9) bond length is 2.05 Å. In the fifth Ni site, Ni(5) is bonded to two equivalent O(7), two equivalent O(8), and two equivalent O(9) atoms to form NiO6 octahedra that share corners with two equivalent Li(1)O6 octahedra, corners with two equivalent Li(3)O6 octahedra, edges with two equivalent Li(4)O6 octahedra, edges with two equivalent Ni(2)O6 octahedra, edges with two equivalent Ni(3)O6 octahedra, and edges with two equivalent Ni(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-17°. Both Ni(5)-O(7) bond lengths are 1.97 Å. Both Ni(5)-O(8) bond lengths are 2.06 Å. Both Ni(5)-O(9) bond lengths are 1.86 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(3), one Li(4), one Ni(4), and two equivalent Ni(1) atoms to form OLi3Ni3 octahedra that share  a cornercorner with one O(1)Li3Ni3 octahedra,  a cornercorner with one O(4)Li2FeNi2 square pyramid,  a cornercorner with one O(3)Li2Ni3 square pyramid, corners with two equivalent O(9)LiNi3 trigonal pyramids,  an edgeedge with one O(1)Li3Ni3 octahedra,  an edgeedge with one O(2)Li3Ni3 octahedra,  an edgeedge with one O(4)Li2FeNi2 square pyramid, edges with two equivalent O(3)Li2Ni3 square pyramids, edges with two equivalent O(5)Li2Ni3 square pyramids, and edges with two equivalent O(8)Li2Ni3 square pyramids. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to one Li(2), one Li(3), one Li(4), one Ni(3), and two equivalent Ni(2) atoms to form OLi3Ni3 octahedra that share  a cornercorner with one O(2)Li3Ni3 octahedra,  a cornercorner with one O(5)Li2Ni3 square pyramid,  a cornercorner with one O(8)Li2Ni3 square pyramid,  an edgeedge with one O(1)Li3Ni3 octahedra,  an edgeedge with one O(2)Li3Ni3 octahedra,  an edgeedge with one O(8)Li2Ni3 square pyramid, edges with two equivalent O(4)Li2FeNi2 square pyramids, edges with two equivalent O(3)Li2Ni3 square pyramids, edges with two equivalent O(5)Li2Ni3 square pyramids, and  an edgeedge with one O(9)LiNi3 trigonal pyramid. The corner-sharing octahedra are not tilted. In the third O site, O(3) is bonded to one Li(1), one Li(3), one Ni(1), one Ni(2), and one Ni(3) atom to form OLi2Ni3 square pyramids that share  a cornercorner with one O(1)Li3Ni3 octahedra,  a cornercorner with one O(4)Li2FeNi2 square pyramid,  a cornercorner with one O(3)Li2Ni3 square pyramid,  a cornercorner with one O(8)Li2Ni3 square pyramid,  a cornercorner with one O(9)LiNi3 trigonal pyramid, edges with two equivalent O(1)Li3Ni3 octahedra, edges with two equivalent O(2)Li3Ni3 octahedra,  an edgeedge with one O(4)Li2FeNi2 square pyramid,  an edgeedge with one O(5)Li2Ni3 square pyramid, and  an edgeedge with one O(8)Li2Ni3 square pyramid. The corner-sharing octahedral tilt angles are 6°. In the fourth O site, O(4) is bonded to one Li(2), one Li(3), one Fe(1), one Ni(1), and one Ni(3) atom to form OLi2FeNi2 square pyramids that share  a cornercorner with one O(1)Li3Ni3 octahedra,  a cornercorner with one O(3)Li2Ni3 square pyramid,  a cornercorner with one O(5)Li2Ni3 square pyramid, corners with two equivalent O(4)Li2FeNi2 square pyramids,  a cornercorner with one O(9)LiNi3 trigonal pyramid,  an edgeedge with one O(1)Li3Ni3 octahedra, edges with two equivalent O(2)Li3Ni3 octahedra,  an edgeedge with one O(3)Li2Ni3 square pyramid, and  an edgeedge with one O(5)Li2Ni3 square pyramid. The corner-sharing octahedral tilt angles are 2°. In the fifth O site, O(5) is bonded to one Li(2), one Li(4), one Ni(1), one Ni(2), and one Ni(4) atom to form OLi2Ni3 square pyramids that share  a cornercorner with one O(2)Li3Ni3 octahedra,  a cornercorner with one O(4)Li2FeNi2 square pyramid,  a cornercorner with one O(5)Li2Ni3 square pyramid,  a cornercorner with one O(8)Li2Ni3 square pyramid, corners with two equivalent O(9)LiNi3 trigonal pyramids, edges with two equivalent O(1)Li3Ni3 octahedra, edges with two equivalent O(2)Li3Ni3 octahedra,  an edgeedge with one O(4)Li2FeNi2 square pyramid,  an edgeedge with one O(3)Li2Ni3 square pyramid, and  an edgeedge with one O(8)Li2Ni3 square pyramid. The corner-sharing octahedral tilt angles are 5°. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Li(3), one Fe(1), one Ni(3), and one Ni(4) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Li(3), one Ni(2), one Ni(3), and one Ni(5) atom. In the eighth O site, O(8) is bonded to one Li(1), one Li(4), one Ni(2), one Ni(4), and one Ni(5) atom to form OLi2Ni3 square pyramids that share  a cornercorner with one O(2)Li3Ni3 octahedra,  a cornercorner with one O(3)Li2Ni3 square pyramid,  a cornercorner with one O(5)Li2Ni3 square pyramid, corners with two equivalent O(8)Li2Ni3 square pyramids,  an edgeedge with one O(2)Li3Ni3 octahedra, edges with two equivalent O(1)Li3Ni3 octahedra,  an edgeedge with one O(3)Li2Ni3 square pyramid,  an edgeedge with one O(5)Li2Ni3 square pyramid, and edges with two equivalent O(9)LiNi3 trigonal pyramids. The corner-sharing octahedral tilt angles are 2°. In the ninth O site, O(9) is bonded to one Li(4), one Ni(3), one Ni(4), and one Ni(5) atom to form OLiNi3 trigonal pyramids that share corners with two equivalent O(1)Li3Ni3 octahedra,  a cornercorner with one O(4)Li2FeNi2 square pyramid,  a cornercorner with one O(3)Li2Ni3 square pyramid, corners with two equivalent O(5)Li2Ni3 square pyramids,  a cornercorner with one O(9)LiNi3 trigonal pyramid,  an edgeedge with one O(2)Li3Ni3 octahedra, and edges with two equivalent O(8)Li2Ni3 square pyramids. The corner-sharing octahedral tilt angles range from 4-11°. In the tenth O site, O(10) is bonded in a see-saw-like geometry to one Li(4), one Fe(1), one Ni(1), and one Ni(4) atom.