Li9NiSi2O10 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are eighteen inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(16), one O(3), and one O(6) atom. In the second Li site, Li(2) is bonded to one O(1), one O(17), one O(3), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Li(5)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(16), one O(2), one O(6), and one O(8) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Si(1)O4 tetrahedra and corners with two equivalent Li(11)O4 trigonal pyramids. In the fourth Li site, Li(4) is bonded in a trigonal planar geometry to one O(13), one O(19), and one O(5) atom. In the fifth Li site, Li(5) is bonded to one O(1), one O(12), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(17)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(11)O4 trigonal pyramid,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. In the sixth Li site, Li(6) is bonded in a distorted trigonal non-coplanar geometry to one O(15), one O(2), and one O(8) atom. In the seventh Li site, Li(7) is bonded in a 4-coordinate geometry to one O(16), one O(6), one O(8), and one O(9) atom. In the eighth Li site, Li(8) is bonded to one O(10), one O(13), one O(18), and one O(5) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(15)O5 square pyramids,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra,  an edgeedge with one Li(9)O4 tetrahedra, and  an edgeedge with one Si(3)O4 tetrahedra. In the ninth Li site, Li(9) is bonded to one O(10), one O(13), one O(14), and one O(4) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(15)O5 square pyramid,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(17)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(15)O5 square pyramid,  an edgeedge with one Li(13)O4 tetrahedra, and  an edgeedge with one Li(8)O4 tetrahedra. In the tenth Li site, Li(10) is bonded to one O(12), one O(17), one O(7), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  an edgeedge with one Li(5)O4 tetrahedra, and  an edgeedge with one Li(11)O4 trigonal pyramid. In the eleventh Li site, Li(11) is bonded to one O(12), one O(16), one O(6), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the twelfth Li site, Li(12) is bonded in a 5-coordinate geometry to one O(11), one O(15), one O(18), one O(2), and one O(8) atom. In the thirteenth Li site, Li(13) is bonded to one O(10), one O(14), one O(17), and one O(20) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(15)O5 square pyramid,  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  an edgeedge with one Li(15)O5 square pyramid,  an edgeedge with one Li(17)O4 tetrahedra, and  an edgeedge with one Li(9)O4 tetrahedra. In the fourteenth Li site, Li(14) is bonded in a 4-coordinate geometry to one O(16), one O(17), one O(3), and one O(9) atom. In the fifteenth Li site, Li(15) is bonded to one O(10), one O(13), one O(14), one O(19), and one O(20) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(17)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(13)O4 tetrahedra,  an edgeedge with one Li(17)O4 tetrahedra,  an edgeedge with one Li(9)O4 tetrahedra, and  an edgeedge with one Si(3)O4 tetrahedra. In the sixteenth Li site, Li(16) is bonded to one O(11), one O(15), one O(18), and one O(5) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(8)O4 tetrahedra and corners with two equivalent Si(3)O4 tetrahedra. In the seventeenth Li site, Li(17) is bonded to one O(14), one O(19), one O(20), and one O(4) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(15)O5 square pyramid,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(15)O5 square pyramid, and  an edgeedge with one Li(13)O4 tetrahedra. In the eighteenth Li site, Li(18) is bonded in a 4-coordinate geometry to one O(18), one O(19), one O(20), and one O(5) atom. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a rectangular see-saw-like geometry to one O(11), one O(18), one O(2), and one O(5) atom. In the second Ni site, Ni(2) is bonded in a 3-coordinate geometry to one O(11), one O(16), and one O(2) atom. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(3), one O(6), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, and  an edgeedge with one Li(11)O4 trigonal pyramid. In the second Si site, Si(2) is bonded to one O(10), one O(20), one O(4), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Li(15)O5 square pyramids,  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Li(17)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Li(9)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(13), one O(15), one O(18), and one O(19) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(17)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra,  an edgeedge with one Li(15)O5 square pyramid, and  an edgeedge with one Li(8)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(1), one O(12), one O(14), and one O(17) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(15)O5 square pyramid,  a cornercorner with one Li(17)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and  a cornercorner with one Li(11)O4 trigonal pyramid. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Li(5), and one Si(4) atom to form distorted OLi3Si trigonal pyramids that share  a cornercorner with one O(16)Li5Ni pentagonal pyramid, corners with two equivalent O(12)Li3Si trigonal pyramids, and  an edgeedge with one O(3)Li3Si trigonal pyramid. In the second O site, O(2) is bonded to one Li(12), one Li(3), one Li(6), one Ni(1), and one Ni(2) atom to form distorted OLi3Ni2 trigonal bipyramids that share  a cornercorner with one O(5)Li4Ni trigonal bipyramid,  a cornercorner with one O(8)Li4Si trigonal bipyramid,  an edgeedge with one O(16)Li5Ni pentagonal pyramid, and  an edgeedge with one O(8)Li4Si trigonal bipyramid. In the third O site, O(3) is bonded to one Li(1), one Li(14), one Li(2), and one Si(1) atom to form distorted OLi3Si trigonal pyramids that share corners with two equivalent O(16)Li5Ni pentagonal pyramids,  a cornercorner with one O(8)Li4Si trigonal bipyramid, and  an edgeedge with one O(1)Li3Si trigonal pyramid. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Li(17), one Li(5), one Li(9), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(16), one Li(18), one Li(4), one Li(8), and one Ni(1) atom to form corner-sharing OLi4Ni trigonal bipyramids. In the sixth O site, O(6) is bonded in a distorted pentagonal planar geometry to one Li(1), one Li(11), one Li(3), one Li(7), and one Si(1) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Li(10), one Li(2), one Li(5), and one Si(2) atom. In the eighth O site, O(8) is bonded to one Li(12), one Li(3), one Li(6), one Li(7), and one Si(1) atom to form distorted OLi4Si trigonal bipyramids that share corners with two equivalent O(16)Li5Ni pentagonal pyramids,  a cornercorner with one O(2)Li3Ni2 trigonal bipyramid,  a cornercorner with one O(3)Li3Si trigonal pyramid, and  an edgeedge with one O(2)Li3Ni2 trigonal bipyramid. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Li(10), one Li(11), one Li(14), one Li(7), and one Si(1) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Li(13), one Li(15), one Li(8), one Li(9), and one Si(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(12), one Li(16), one Ni(1), and one Ni(2) atom. In the twelfth O site, O(12) is bonded to one Li(10), one Li(11), one Li(5), and one Si(4) atom to form distorted OLi3Si trigonal pyramids that share  a cornercorner with one O(16)Li5Ni pentagonal pyramid and corners with two equivalent O(1)Li3Si trigonal pyramids. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Li(15), one Li(4), one Li(8), one Li(9), and one Si(3) atom. In the fourteenth O site, O(14) is bonded in a 5-coordinate geometry to one Li(13), one Li(15), one Li(17), one Li(9), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a distorted see-saw-like geometry to one Li(12), one Li(16), one Li(6), and one Si(3) atom. In the sixteenth O site, O(16) is bonded to one Li(1), one Li(11), one Li(14), one Li(3), one Li(7), and one Ni(2) atom to form distorted OLi5Ni pentagonal pyramids that share corners with two equivalent O(8)Li4Si trigonal bipyramids,  a cornercorner with one O(1)Li3Si trigonal pyramid,  a cornercorner with one O(12)Li3Si trigonal pyramid, corners with two equivalent O(3)Li3Si trigonal pyramids, and  an edgeedge with one O(2)Li3Ni2 trigonal bipyramid. In the seventeenth O site, O(17) is bonded in a 5-coordinate geometry to one Li(10), one Li(13), one Li(14), one Li(2), and one Si(4) atom. In the eighteenth O site, O(18) is bonded in a 6-coordinate geometry to one Li(12), one Li(16), one Li(18), one Li(8), one Ni(1), and one Si(3) atom. In the nineteenth O site, O(19) is bonded in a 5-coordinate geometry to one Li(15), one Li(17), one Li(18), one Li(4), and one Si(3) atom. In the twentieth O site, O(20) is bonded in a 5-coordinate geometry to one Li(13), one Li(15), one Li(17), one Li(18), and one Si(2) atom.
Li9NiSi2O10 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. There are eighteen inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(16), one O(3), and one O(6) atom. The Li(1)-O(1) bond length is 1.89 Å. The Li(1)-O(16) bond length is 1.96 Å. The Li(1)-O(3) bond length is 1.97 Å. The Li(1)-O(6) bond length is 2.12 Å. In the second Li site, Li(2) is bonded to one O(1), one O(17), one O(3), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Li(5)O4 tetrahedra. The Li(2)-O(1) bond length is 2.09 Å. The Li(2)-O(17) bond length is 1.95 Å. The Li(2)-O(3) bond length is 1.94 Å. The Li(2)-O(7) bond length is 1.91 Å. In the third Li site, Li(3) is bonded to one O(16), one O(2), one O(6), and one O(8) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Si(1)O4 tetrahedra and corners with two equivalent Li(11)O4 trigonal pyramids. The Li(3)-O(16) bond length is 2.01 Å. The Li(3)-O(2) bond length is 2.01 Å. The Li(3)-O(6) bond length is 2.04 Å. The Li(3)-O(8) bond length is 1.95 Å. In the fourth Li site, Li(4) is bonded in a trigonal planar geometry to one O(13), one O(19), and one O(5) atom. The Li(4)-O(13) bond length is 1.87 Å. The Li(4)-O(19) bond length is 1.91 Å. The Li(4)-O(5) bond length is 1.92 Å. In the fifth Li site, Li(5) is bonded to one O(1), one O(12), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(17)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  a cornercorner with one Li(11)O4 trigonal pyramid,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The Li(5)-O(1) bond length is 1.91 Å. The Li(5)-O(12) bond length is 1.92 Å. The Li(5)-O(4) bond length is 1.97 Å. The Li(5)-O(7) bond length is 2.11 Å. In the sixth Li site, Li(6) is bonded in a distorted trigonal non-coplanar geometry to one O(15), one O(2), and one O(8) atom. The Li(6)-O(15) bond length is 1.90 Å. The Li(6)-O(2) bond length is 1.96 Å. The Li(6)-O(8) bond length is 1.95 Å. In the seventh Li site, Li(7) is bonded in a 4-coordinate geometry to one O(16), one O(6), one O(8), and one O(9) atom. The Li(7)-O(16) bond length is 2.00 Å. The Li(7)-O(6) bond length is 1.96 Å. The Li(7)-O(8) bond length is 2.02 Å. The Li(7)-O(9) bond length is 2.03 Å. In the eighth Li site, Li(8) is bonded to one O(10), one O(13), one O(18), and one O(5) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(15)O5 square pyramids,  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra,  an edgeedge with one Li(9)O4 tetrahedra, and  an edgeedge with one Si(3)O4 tetrahedra. The Li(8)-O(10) bond length is 1.88 Å. The Li(8)-O(13) bond length is 2.12 Å. The Li(8)-O(18) bond length is 1.98 Å. The Li(8)-O(5) bond length is 1.88 Å. In the ninth Li site, Li(9) is bonded to one O(10), one O(13), one O(14), and one O(4) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(15)O5 square pyramid,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(17)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(15)O5 square pyramid,  an edgeedge with one Li(13)O4 tetrahedra, and  an edgeedge with one Li(8)O4 tetrahedra. The Li(9)-O(10) bond length is 2.03 Å. The Li(9)-O(13) bond length is 2.00 Å. The Li(9)-O(14) bond length is 1.91 Å. The Li(9)-O(4) bond length is 1.90 Å. In the tenth Li site, Li(10) is bonded to one O(12), one O(17), one O(7), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  an edgeedge with one Li(5)O4 tetrahedra, and  an edgeedge with one Li(11)O4 trigonal pyramid. The Li(10)-O(12) bond length is 2.07 Å. The Li(10)-O(17) bond length is 1.95 Å. The Li(10)-O(7) bond length is 1.89 Å. The Li(10)-O(9) bond length is 2.02 Å. In the eleventh Li site, Li(11) is bonded to one O(12), one O(16), one O(6), and one O(9) atom to form distorted LiO4 trigonal pyramids that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra,  an edgeedge with one Li(10)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The Li(11)-O(12) bond length is 1.89 Å. The Li(11)-O(16) bond length is 1.94 Å. The Li(11)-O(6) bond length is 2.09 Å. The Li(11)-O(9) bond length is 1.99 Å. In the twelfth Li site, Li(12) is bonded in a 5-coordinate geometry to one O(11), one O(15), one O(18), one O(2), and one O(8) atom. The Li(12)-O(11) bond length is 2.40 Å. The Li(12)-O(15) bond length is 2.00 Å. The Li(12)-O(18) bond length is 2.47 Å. The Li(12)-O(2) bond length is 2.08 Å. The Li(12)-O(8) bond length is 2.11 Å. In the thirteenth Li site, Li(13) is bonded to one O(10), one O(14), one O(17), and one O(20) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Li(15)O5 square pyramid,  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra,  an edgeedge with one Li(15)O5 square pyramid,  an edgeedge with one Li(17)O4 tetrahedra, and  an edgeedge with one Li(9)O4 tetrahedra. The Li(13)-O(10) bond length is 2.01 Å. The Li(13)-O(14) bond length is 2.13 Å. The Li(13)-O(17) bond length is 2.03 Å. The Li(13)-O(20) bond length is 2.08 Å. In the fourteenth Li site, Li(14) is bonded in a 4-coordinate geometry to one O(16), one O(17), one O(3), and one O(9) atom. The Li(14)-O(16) bond length is 1.94 Å. The Li(14)-O(17) bond length is 2.42 Å. The Li(14)-O(3) bond length is 1.83 Å. The Li(14)-O(9) bond length is 1.91 Å. In the fifteenth Li site, Li(15) is bonded to one O(10), one O(13), one O(14), one O(19), and one O(20) atom to form distorted LiO5 square pyramids that share  a cornercorner with one Li(13)O4 tetrahedra,  a cornercorner with one Li(17)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(13)O4 tetrahedra,  an edgeedge with one Li(17)O4 tetrahedra,  an edgeedge with one Li(9)O4 tetrahedra, and  an edgeedge with one Si(3)O4 tetrahedra. The Li(15)-O(10) bond length is 2.35 Å. The Li(15)-O(13) bond length is 2.26 Å. The Li(15)-O(14) bond length is 2.09 Å. The Li(15)-O(19) bond length is 2.33 Å. The Li(15)-O(20) bond length is 2.12 Å. In the sixteenth Li site, Li(16) is bonded to one O(11), one O(15), one O(18), and one O(5) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Li(8)O4 tetrahedra and corners with two equivalent Si(3)O4 tetrahedra. The Li(16)-O(11) bond length is 1.94 Å. The Li(16)-O(15) bond length is 1.94 Å. The Li(16)-O(18) bond length is 2.09 Å. The Li(16)-O(5) bond length is 2.01 Å. In the seventeenth Li site, Li(17) is bonded to one O(14), one O(19), one O(20), and one O(4) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(15)O5 square pyramid,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(9)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Li(15)O5 square pyramid, and  an edgeedge with one Li(13)O4 tetrahedra. The Li(17)-O(14) bond length is 1.91 Å. The Li(17)-O(19) bond length is 2.01 Å. The Li(17)-O(20) bond length is 2.05 Å. The Li(17)-O(4) bond length is 1.89 Å. In the eighteenth Li site, Li(18) is bonded in a 4-coordinate geometry to one O(18), one O(19), one O(20), and one O(5) atom. The Li(18)-O(18) bond length is 2.39 Å. The Li(18)-O(19) bond length is 1.91 Å. The Li(18)-O(20) bond length is 1.90 Å. The Li(18)-O(5) bond length is 1.86 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a rectangular see-saw-like geometry to one O(11), one O(18), one O(2), and one O(5) atom. The Ni(1)-O(11) bond length is 1.90 Å. The Ni(1)-O(18) bond length is 2.14 Å. The Ni(1)-O(2) bond length is 1.83 Å. The Ni(1)-O(5) bond length is 1.79 Å. In the second Ni site, Ni(2) is bonded in a 3-coordinate geometry to one O(11), one O(16), and one O(2) atom. The Ni(2)-O(11) bond length is 1.85 Å. The Ni(2)-O(16) bond length is 1.85 Å. The Ni(2)-O(2) bond length is 2.00 Å. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(3), one O(6), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, and  an edgeedge with one Li(11)O4 trigonal pyramid. The Si(1)-O(3) bond length is 1.63 Å. The Si(1)-O(6) bond length is 1.66 Å. The Si(1)-O(8) bond length is 1.66 Å. The Si(1)-O(9) bond length is 1.65 Å. In the second Si site, Si(2) is bonded to one O(10), one O(20), one O(4), and one O(7) atom to form SiO4 tetrahedra that share corners with two equivalent Li(15)O5 square pyramids,  a cornercorner with one Li(10)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Li(17)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Li(9)O4 tetrahedra. The Si(2)-O(10) bond length is 1.67 Å. The Si(2)-O(20) bond length is 1.67 Å. The Si(2)-O(4) bond length is 1.64 Å. The Si(2)-O(7) bond length is 1.64 Å. In the third Si site, Si(3) is bonded to one O(13), one O(15), one O(18), and one O(19) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(17)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(16)O4 tetrahedra,  an edgeedge with one Li(15)O5 square pyramid, and  an edgeedge with one Li(8)O4 tetrahedra. The Si(3)-O(13) bond length is 1.65 Å. The Si(3)-O(15) bond length is 1.62 Å. The Si(3)-O(18) bond length is 1.71 Å. The Si(3)-O(19) bond length is 1.66 Å. In the fourth Si site, Si(4) is bonded to one O(1), one O(12), one O(14), and one O(17) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(15)O5 square pyramid,  a cornercorner with one Li(17)O4 tetrahedra,  a cornercorner with one Li(9)O4 tetrahedra, corners with two equivalent Li(10)O4 tetrahedra, corners with two equivalent Li(13)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and  a cornercorner with one Li(11)O4 trigonal pyramid. The Si(4)-O(1) bond length is 1.64 Å. The Si(4)-O(12) bond length is 1.65 Å. The Si(4)-O(14) bond length is 1.65 Å. The Si(4)-O(17) bond length is 1.65 Å. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(2), one Li(5), and one Si(4) atom to form distorted OLi3Si trigonal pyramids that share  a cornercorner with one O(16)Li5Ni pentagonal pyramid, corners with two equivalent O(12)Li3Si trigonal pyramids, and  an edgeedge with one O(3)Li3Si trigonal pyramid. In the second O site, O(2) is bonded to one Li(12), one Li(3), one Li(6), one Ni(1), and one Ni(2) atom to form distorted OLi3Ni2 trigonal bipyramids that share  a cornercorner with one O(5)Li4Ni trigonal bipyramid,  a cornercorner with one O(8)Li4Si trigonal bipyramid,  an edgeedge with one O(16)Li5Ni pentagonal pyramid, and  an edgeedge with one O(8)Li4Si trigonal bipyramid. In the third O site, O(3) is bonded to one Li(1), one Li(14), one Li(2), and one Si(1) atom to form distorted OLi3Si trigonal pyramids that share corners with two equivalent O(16)Li5Ni pentagonal pyramids,  a cornercorner with one O(8)Li4Si trigonal bipyramid, and  an edgeedge with one O(1)Li3Si trigonal pyramid. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Li(17), one Li(5), one Li(9), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(16), one Li(18), one Li(4), one Li(8), and one Ni(1) atom to form corner-sharing OLi4Ni trigonal bipyramids. In the sixth O site, O(6) is bonded in a distorted pentagonal planar geometry to one Li(1), one Li(11), one Li(3), one Li(7), and one Si(1) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Li(10), one Li(2), one Li(5), and one Si(2) atom. In the eighth O site, O(8) is bonded to one Li(12), one Li(3), one Li(6), one Li(7), and one Si(1) atom to form distorted OLi4Si trigonal bipyramids that share corners with two equivalent O(16)Li5Ni pentagonal pyramids,  a cornercorner with one O(2)Li3Ni2 trigonal bipyramid,  a cornercorner with one O(3)Li3Si trigonal pyramid, and  an edgeedge with one O(2)Li3Ni2 trigonal bipyramid. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Li(10), one Li(11), one Li(14), one Li(7), and one Si(1) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Li(13), one Li(15), one Li(8), one Li(9), and one Si(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(12), one Li(16), one Ni(1), and one Ni(2) atom. In the twelfth O site, O(12) is bonded to one Li(10), one Li(11), one Li(5), and one Si(4) atom to form distorted OLi3Si trigonal pyramids that share  a cornercorner with one O(16)Li5Ni pentagonal pyramid and corners with two equivalent O(1)Li3Si trigonal pyramids. In the thirteenth O site, O(13) is bonded in a 5-coordinate geometry to one Li(15), one Li(4), one Li(8), one Li(9), and one Si(3) atom. In the fourteenth O site, O(14) is bonded in a 5-coordinate geometry to one Li(13), one Li(15), one Li(17), one Li(9), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a distorted see-saw-like geometry to one Li(12), one Li(16), one Li(6), and one Si(3) atom. In the sixteenth O site, O(16) is bonded to one Li(1), one Li(11), one Li(14), one Li(3), one Li(7), and one Ni(2) atom to form distorted OLi5Ni pentagonal pyramids that share corners with two equivalent O(8)Li4Si trigonal bipyramids,  a cornercorner with one O(1)Li3Si trigonal pyramid,  a cornercorner with one O(12)Li3Si trigonal pyramid, corners with two equivalent O(3)Li3Si trigonal pyramids, and  an edgeedge with one O(2)Li3Ni2 trigonal bipyramid. In the seventeenth O site, O(17) is bonded in a 5-coordinate geometry to one Li(10), one Li(13), one Li(14), one Li(2), and one Si(4) atom. In the eighteenth O site, O(18) is bonded in a 6-coordinate geometry to one Li(12), one Li(16), one Li(18), one Li(8), one Ni(1), and one Si(3) atom. In the nineteenth O site, O(19) is bonded in a 5-coordinate geometry to one Li(15), one Li(17), one Li(18), one Li(4), and one Si(3) atom. In the twentieth O site, O(20) is bonded in a 5-coordinate geometry to one Li(13), one Li(15), one Li(17), one Li(18), and one Si(2) atom.