Li2NiSiO4 is beta beryllia-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(10), one O(13), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, and  an edgeedge with one Si(3)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(14), one O(2), one O(8), and one O(9) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and  an edgeedge with one Si(4)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(11), one O(16), one O(3), and one O(5) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(12), one O(15), one O(4), and one O(6) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(1), one O(11), one O(13), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Ni(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Ni(4)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(12), one O(14), one O(2), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Ni(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Ni(2)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(16), one O(3), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Ni(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Ni(3)O4 tetrahedra. In the eighth Li site, Li(8) is bonded to one O(10), one O(15), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Ni(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Ni(1)O4 tetrahedra. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(1), one O(10), one O(15), and one O(6) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Li(8)O4 tetrahedra. In the second Ni site, Ni(2) is bonded to one O(12), one O(14), one O(4), and one O(8) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Li(6)O4 tetrahedra. In the third Ni site, Ni(3) is bonded to one O(16), one O(2), one O(5), and one O(9) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Li(7)O4 tetrahedra. In the fourth Ni site, Ni(4) is bonded to one O(11), one O(13), one O(3), and one O(7) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Li(5)O4 tetrahedra. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(3), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(10), one O(14), one O(4), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, and  an edgeedge with one Li(4)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(1), one O(11), one O(15), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(12), one O(16), one O(2), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(5), one Ni(1), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi trigonal pyramids. In the second O site, O(2) is bonded to one Li(2), one Li(6), one Ni(3), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi trigonal pyramids. In the third O site, O(3) is bonded to one Li(3), one Li(7), one Ni(4), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi trigonal pyramids. In the fourth O site, O(4) is bonded to one Li(4), one Li(8), one Ni(2), and one Si(2) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi trigonal pyramids. In the fifth O site, O(5) is bonded to one Li(3), one Li(5), one Ni(3), and one Si(1) atom to form a mixture of corner and edge-sharing OLi2SiNi tetrahedra. In the sixth O site, O(6) is bonded to one Li(4), one Li(6), one Ni(1), and one Si(2) atom to form a mixture of corner and edge-sharing OLi2SiNi tetrahedra. In the seventh O site, O(7) is bonded to one Li(1), one Li(8), one Ni(4), and one Si(3) atom to form a mixture of corner and edge-sharing OLi2SiNi tetrahedra. In the eighth O site, O(8) is bonded to one Li(2), one Li(7), one Ni(2), and one Si(4) atom to form a mixture of corner and edge-sharing OLi2SiNi tetrahedra. In the ninth O site, O(9) is bonded to one Li(2), one Li(7), one Ni(3), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the tenth O site, O(10) is bonded to one Li(1), one Li(8), one Ni(1), and one Si(2) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the eleventh O site, O(11) is bonded to one Li(3), one Li(5), one Ni(4), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the twelfth O site, O(12) is bonded to one Li(4), one Li(6), one Ni(2), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the thirteenth O site, O(13) is bonded to one Li(1), one Li(5), one Ni(4), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the fourteenth O site, O(14) is bonded to one Li(2), one Li(6), one Ni(2), and one Si(2) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the fifteenth O site, O(15) is bonded to one Li(4), one Li(8), one Ni(1), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the sixteenth O site, O(16) is bonded to one Li(3), one Li(7), one Ni(3), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra.
Li2NiSiO4 is beta beryllia-derived structured and crystallizes in the triclinic P1 space group. There are eight inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(10), one O(13), and one O(7) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, and  an edgeedge with one Si(3)O4 tetrahedra. The Li(1)-O(1) bond length is 2.13 Å. The Li(1)-O(10) bond length is 1.99 Å. The Li(1)-O(13) bond length is 2.01 Å. The Li(1)-O(7) bond length is 2.00 Å. In the second Li site, Li(2) is bonded to one O(14), one O(2), one O(8), and one O(9) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and  an edgeedge with one Si(4)O4 tetrahedra. The Li(2)-O(14) bond length is 2.01 Å. The Li(2)-O(2) bond length is 2.09 Å. The Li(2)-O(8) bond length is 2.01 Å. The Li(2)-O(9) bond length is 2.01 Å. In the third Li site, Li(3) is bonded to one O(11), one O(16), one O(3), and one O(5) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, and  an edgeedge with one Si(1)O4 tetrahedra. The Li(3)-O(11) bond length is 2.00 Å. The Li(3)-O(16) bond length is 1.98 Å. The Li(3)-O(3) bond length is 2.10 Å. The Li(3)-O(5) bond length is 2.07 Å. In the fourth Li site, Li(4) is bonded to one O(12), one O(15), one O(4), and one O(6) atom to form distorted LiO4 tetrahedra that share  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, and  an edgeedge with one Si(2)O4 tetrahedra. The Li(4)-O(12) bond length is 2.00 Å. The Li(4)-O(15) bond length is 1.97 Å. The Li(4)-O(4) bond length is 2.12 Å. The Li(4)-O(6) bond length is 2.03 Å. In the fifth Li site, Li(5) is bonded to one O(1), one O(11), one O(13), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Ni(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Ni(4)O4 tetrahedra. The Li(5)-O(1) bond length is 1.94 Å. The Li(5)-O(11) bond length is 2.06 Å. The Li(5)-O(13) bond length is 2.00 Å. The Li(5)-O(5) bond length is 1.93 Å. In the sixth Li site, Li(6) is bonded to one O(12), one O(14), one O(2), and one O(6) atom to form LiO4 tetrahedra that share  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Ni(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Ni(2)O4 tetrahedra. The Li(6)-O(12) bond length is 2.05 Å. The Li(6)-O(14) bond length is 2.01 Å. The Li(6)-O(2) bond length is 1.93 Å. The Li(6)-O(6) bond length is 1.93 Å. In the seventh Li site, Li(7) is bonded to one O(16), one O(3), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Ni(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Ni(3)O4 tetrahedra. The Li(7)-O(16) bond length is 2.02 Å. The Li(7)-O(3) bond length is 1.95 Å. The Li(7)-O(8) bond length is 1.93 Å. The Li(7)-O(9) bond length is 2.04 Å. In the eighth Li site, Li(8) is bonded to one O(10), one O(15), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Ni(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Ni(1)O4 tetrahedra. The Li(8)-O(10) bond length is 2.05 Å. The Li(8)-O(15) bond length is 2.01 Å. The Li(8)-O(4) bond length is 1.93 Å. The Li(8)-O(7) bond length is 1.94 Å. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(1), one O(10), one O(15), and one O(6) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Li(8)O4 tetrahedra. The Ni(1)-O(1) bond length is 1.95 Å. The Ni(1)-O(10) bond length is 2.00 Å. The Ni(1)-O(15) bond length is 1.99 Å. The Ni(1)-O(6) bond length is 1.97 Å. In the second Ni site, Ni(2) is bonded to one O(12), one O(14), one O(4), and one O(8) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Li(6)O4 tetrahedra. The Ni(2)-O(12) bond length is 2.00 Å. The Ni(2)-O(14) bond length is 1.99 Å. The Ni(2)-O(4) bond length is 1.96 Å. The Ni(2)-O(8) bond length is 1.96 Å. In the third Ni site, Ni(3) is bonded to one O(16), one O(2), one O(5), and one O(9) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and  an edgeedge with one Li(7)O4 tetrahedra. The Ni(3)-O(16) bond length is 2.00 Å. The Ni(3)-O(2) bond length is 1.97 Å. The Ni(3)-O(5) bond length is 1.96 Å. The Ni(3)-O(9) bond length is 1.99 Å. In the fourth Ni site, Ni(4) is bonded to one O(11), one O(13), one O(3), and one O(7) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Li(5)O4 tetrahedra. The Ni(4)-O(11) bond length is 2.00 Å. The Ni(4)-O(13) bond length is 1.99 Å. The Ni(4)-O(3) bond length is 1.96 Å. The Ni(4)-O(7) bond length is 1.96 Å. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(3), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, and  an edgeedge with one Li(3)O4 tetrahedra. The Si(1)-O(13) bond length is 1.65 Å. The Si(1)-O(3) bond length is 1.66 Å. The Si(1)-O(5) 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(14), one O(4), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, and  an edgeedge with one Li(4)O4 tetrahedra. The Si(2)-O(10) bond length is 1.65 Å. The Si(2)-O(14) bond length is 1.65 Å. The Si(2)-O(4) bond length is 1.66 Å. The Si(2)-O(6) bond length is 1.66 Å. In the third Si site, Si(3) is bonded to one O(1), one O(11), one O(15), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. The Si(3)-O(1) bond length is 1.65 Å. The Si(3)-O(11) bond length is 1.65 Å. The Si(3)-O(15) bond length is 1.65 Å. The Si(3)-O(7) bond length is 1.66 Å. In the fourth Si site, Si(4) is bonded to one O(12), one O(16), one O(2), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and  an edgeedge with one Li(2)O4 tetrahedra. The Si(4)-O(12) bond length is 1.65 Å. The Si(4)-O(16) bond length is 1.65 Å. The Si(4)-O(2) bond length is 1.65 Å. The Si(4)-O(8) bond length is 1.66 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(1), one Li(5), one Ni(1), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi trigonal pyramids. In the second O site, O(2) is bonded to one Li(2), one Li(6), one Ni(3), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi trigonal pyramids. In the third O site, O(3) is bonded to one Li(3), one Li(7), one Ni(4), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi trigonal pyramids. In the fourth O site, O(4) is bonded to one Li(4), one Li(8), one Ni(2), and one Si(2) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi trigonal pyramids. In the fifth O site, O(5) is bonded to one Li(3), one Li(5), one Ni(3), and one Si(1) atom to form a mixture of corner and edge-sharing OLi2SiNi tetrahedra. In the sixth O site, O(6) is bonded to one Li(4), one Li(6), one Ni(1), and one Si(2) atom to form a mixture of corner and edge-sharing OLi2SiNi tetrahedra. In the seventh O site, O(7) is bonded to one Li(1), one Li(8), one Ni(4), and one Si(3) atom to form a mixture of corner and edge-sharing OLi2SiNi tetrahedra. In the eighth O site, O(8) is bonded to one Li(2), one Li(7), one Ni(2), and one Si(4) atom to form a mixture of corner and edge-sharing OLi2SiNi tetrahedra. In the ninth O site, O(9) is bonded to one Li(2), one Li(7), one Ni(3), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the tenth O site, O(10) is bonded to one Li(1), one Li(8), one Ni(1), and one Si(2) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the eleventh O site, O(11) is bonded to one Li(3), one Li(5), one Ni(4), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the twelfth O site, O(12) is bonded to one Li(4), one Li(6), one Ni(2), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the thirteenth O site, O(13) is bonded to one Li(1), one Li(5), one Ni(4), and one Si(1) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the fourteenth O site, O(14) is bonded to one Li(2), one Li(6), one Ni(2), and one Si(2) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the fifteenth O site, O(15) is bonded to one Li(4), one Li(8), one Ni(1), and one Si(3) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra. In the sixteenth O site, O(16) is bonded to one Li(3), one Li(7), one Ni(3), and one Si(4) atom to form a mixture of distorted corner and edge-sharing OLi2SiNi tetrahedra.