Li2Ni5Si5O16 crystallizes in the triclinic P1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(13), one O(6), one O(8), and one O(9) atom. In the second Li site, Li(2) is bonded to one O(14), one O(15), one O(2), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are five inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(1), one O(11), one O(16), and one O(3) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(5)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the second Ni site, Ni(2) is bonded to one O(10), one O(11), one O(3), and one O(7) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the third Ni site, Ni(3) is bonded to one O(10), one O(12), one O(4), and one O(7) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(5)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the fourth Ni site, Ni(4) is bonded to one O(14), one O(5), one O(8), and one O(9) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the fifth Ni site, Ni(5) is bonded to one O(1), one O(12), one O(16), and one O(4) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(15), one O(2), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Si(5)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and corners with two equivalent Ni(5)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(2), one O(3), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Ni(4)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(14), and one O(16) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Ni(3)O4 tetrahedra,  a cornercorner with one Ni(4)O4 tetrahedra,  a cornercorner with one Ni(5)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, and corners with two equivalent Ni(2)O4 tetrahedra. In the fifth Si site, Si(5) is bonded to one O(12), one O(13), one O(15), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Ni(3)O4 tetrahedra,  a cornercorner with one Ni(4)O4 tetrahedra,  a cornercorner with one Ni(5)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Ni(1), one Ni(5), and one Si(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(2), one Si(1), and one Si(3) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ni(1), one Ni(2), and one Si(3) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Ni(3), one Ni(5), and one Si(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Li(2), one Ni(4), and one Si(3) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(1), one Si(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ni(2), one Ni(3), and one Si(2) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Li(1), one Ni(4), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Li(1), one Ni(4), and one Si(5) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Ni(2), one Ni(3), and one Si(4) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Ni(1), one Ni(2), and one Si(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Ni(3), one Ni(5), and one Si(5) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one Li(1), one Si(1), and one Si(5) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Li(2), one Ni(4), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one Li(2), one Si(1), and one Si(5) atom. In the sixteenth O site, O(16) is bonded in a trigonal non-coplanar geometry to one Ni(1), one Ni(5), and one Si(4) atom.
Li2Ni5Si5O16 crystallizes in the triclinic P1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(13), one O(6), one O(8), and one O(9) atom. The Li(1)-O(13) bond length is 2.59 Å. The Li(1)-O(6) bond length is 2.29 Å. The Li(1)-O(8) bond length is 1.88 Å. The Li(1)-O(9) bond length is 1.95 Å. In the second Li site, Li(2) is bonded to one O(14), one O(15), one O(2), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Ni(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The Li(2)-O(14) bond length is 1.94 Å. The Li(2)-O(15) bond length is 2.23 Å. The Li(2)-O(2) bond length is 2.04 Å. The Li(2)-O(5) bond length is 1.92 Å. There are five inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(1), one O(11), one O(16), and one O(3) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(5)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Ni(1)-O(1) bond length is 1.99 Å. The Ni(1)-O(11) bond length is 1.96 Å. The Ni(1)-O(16) bond length is 1.98 Å. The Ni(1)-O(3) bond length is 1.96 Å. In the second Ni site, Ni(2) is bonded to one O(10), one O(11), one O(3), and one O(7) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Ni(2)-O(10) bond length is 1.99 Å. The Ni(2)-O(11) bond length is 1.96 Å. The Ni(2)-O(3) bond length is 2.00 Å. The Ni(2)-O(7) bond length is 2.06 Å. In the third Ni site, Ni(3) is bonded to one O(10), one O(12), one O(4), and one O(7) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, corners with two equivalent Ni(5)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Ni(3)-O(10) bond length is 1.98 Å. The Ni(3)-O(12) bond length is 1.98 Å. The Ni(3)-O(4) bond length is 1.98 Å. The Ni(3)-O(7) bond length is 2.00 Å. In the fourth Ni site, Ni(4) is bonded to one O(14), one O(5), one O(8), and one O(9) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The Ni(4)-O(14) bond length is 1.97 Å. The Ni(4)-O(5) bond length is 1.98 Å. The Ni(4)-O(8) bond length is 1.97 Å. The Ni(4)-O(9) bond length is 2.00 Å. In the fifth Ni site, Ni(5) is bonded to one O(1), one O(12), one O(16), and one O(4) atom to form NiO4 tetrahedra that share  a cornercorner with one Si(4)O4 tetrahedra,  a cornercorner with one Si(5)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Ni(5)-O(1) bond length is 1.98 Å. The Ni(5)-O(12) bond length is 1.96 Å. The Ni(5)-O(16) bond length is 1.93 Å. The Ni(5)-O(4) bond length is 1.98 Å. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(13), one O(15), one O(2), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Si(5)O4 tetrahedra. The Si(1)-O(13) bond length is 1.64 Å. The Si(1)-O(15) bond length is 1.64 Å. The Si(1)-O(2) bond length is 1.64 Å. The Si(1)-O(6) bond length is 1.66 Å. In the second Si site, Si(2) is bonded to one O(1), one O(4), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Ni(3)O4 tetrahedra, and corners with two equivalent Ni(5)O4 tetrahedra. The Si(2)-O(1) bond length is 1.63 Å. The Si(2)-O(4) bond length is 1.63 Å. The Si(2)-O(6) bond length is 1.68 Å. The Si(2)-O(7) bond length is 1.63 Å. In the third Si site, Si(3) is bonded to one O(2), one O(3), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with two equivalent Ni(4)O4 tetrahedra. The Si(3)-O(2) bond length is 1.71 Å. The Si(3)-O(3) bond length is 1.64 Å. The Si(3)-O(5) bond length is 1.62 Å. The Si(3)-O(8) bond length is 1.62 Å. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(14), and one O(16) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Ni(3)O4 tetrahedra,  a cornercorner with one Ni(4)O4 tetrahedra,  a cornercorner with one Ni(5)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, and corners with two equivalent Ni(2)O4 tetrahedra. The Si(4)-O(10) bond length is 1.65 Å. The Si(4)-O(11) bond length is 1.65 Å. The Si(4)-O(14) bond length is 1.62 Å. The Si(4)-O(16) bond length is 1.65 Å. In the fifth Si site, Si(5) is bonded to one O(12), one O(13), one O(15), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Ni(3)O4 tetrahedra,  a cornercorner with one Ni(4)O4 tetrahedra,  a cornercorner with one Ni(5)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The Si(5)-O(12) bond length is 1.63 Å. The Si(5)-O(13) bond length is 1.67 Å. The Si(5)-O(15) bond length is 1.67 Å. The Si(5)-O(9) bond length is 1.60 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Ni(1), one Ni(5), and one Si(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(2), one Si(1), and one Si(3) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ni(1), one Ni(2), and one Si(3) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Ni(3), one Ni(5), and one Si(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Li(2), one Ni(4), and one Si(3) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(1), one Si(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to one Ni(2), one Ni(3), and one Si(2) atom. In the eighth O site, O(8) is bonded in a trigonal non-coplanar geometry to one Li(1), one Ni(4), and one Si(3) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Li(1), one Ni(4), and one Si(5) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Ni(2), one Ni(3), and one Si(4) atom. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Ni(1), one Ni(2), and one Si(4) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Ni(3), one Ni(5), and one Si(5) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one Li(1), one Si(1), and one Si(5) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Li(2), one Ni(4), and one Si(4) atom. In the fifteenth O site, O(15) is bonded in a distorted trigonal non-coplanar geometry to one Li(2), one Si(1), and one Si(5) atom. In the sixteenth O site, O(16) is bonded in a trigonal non-coplanar geometry to one Ni(1), one Ni(5), and one Si(4) atom.