Li4NiSi2O7 is Stannite-like 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(11), one O(13), one O(2), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(12), one O(14), and one O(4) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the third Li site, Li(3) 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 Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the fourth Li site, Li(4) 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 Li(1)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the fifth Li site, Li(5) is bonded to one O(13), one O(3), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the sixth Li site, Li(6) is bonded to one O(10), one O(14), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the seventh Li site, Li(7) is bonded to one O(10), one O(11), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the eighth Li site, Li(8) is bonded to one O(12), one O(6), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(10), one O(3), one O(5), and one O(8) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the second Ni site, Ni(2) is bonded to one O(4), one O(6), one O(7), and one O(9) atom to form distorted NiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(2), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, and corners with two equivalent Ni(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(12), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent Ni(1)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(1), one O(13), one O(4), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Ni(2)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(10), one O(14), one O(2), and one O(3) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, and corners with two equivalent Ni(1)O4 tetrahedra. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), one Li(3), one Si(2), and one Si(3) atom to form OLi2Si2 tetrahedra that share  a cornercorner with one O(8)Li2SiNi tetrahedra,  a cornercorner with one O(9)Li2SiNi tetrahedra,  a cornercorner with one O(11)Li3Si tetrahedra,  a cornercorner with one O(14)Li3Si tetrahedra, corners with two equivalent O(4)Li2SiNi tetrahedra, corners with two equivalent O(5)Li2SiNi tetrahedra, corners with two equivalent O(12)Li3Si tetrahedra, and corners with two equivalent O(13)Li3Si tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(4), one Si(1), and one Si(4) atom to form OLi2Si2 tetrahedra that share  a cornercorner with one O(10)Li2SiNi tetrahedra,  a cornercorner with one O(7)Li2SiNi tetrahedra,  a cornercorner with one O(12)Li3Si tetrahedra,  a cornercorner with one O(13)Li3Si tetrahedra, corners with two equivalent O(3)Li2SiNi tetrahedra, corners with two equivalent O(6)Li2SiNi tetrahedra, corners with two equivalent O(11)Li3Si tetrahedra, and corners with two equivalent O(14)Li3Si tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(5), one Ni(1), and one Si(4) atom to form distorted OLi2SiNi tetrahedra that share  a cornercorner with one O(5)Li2SiNi tetrahedra,  a cornercorner with one O(9)Li2SiNi tetrahedra,  a cornercorner with one O(11)Li3Si tetrahedra,  a cornercorner with one O(14)Li3Si tetrahedra, corners with two equivalent O(2)Li2Si2 tetrahedra, corners with two equivalent O(10)Li2SiNi tetrahedra, corners with two equivalent O(8)Li2SiNi tetrahedra, and corners with two equivalent O(13)Li3Si tetrahedra. In the fourth O site, O(4) is bonded to one Li(2), one Li(6), one Ni(2), and one Si(3) atom to form distorted OLi2SiNi tetrahedra that share  a cornercorner with one O(10)Li2SiNi tetrahedra,  a cornercorner with one O(6)Li2SiNi tetrahedra,  a cornercorner with one O(12)Li3Si tetrahedra,  a cornercorner with one O(13)Li3Si tetrahedra, corners with two equivalent O(1)Li2Si2 tetrahedra, corners with two equivalent O(7)Li2SiNi tetrahedra, corners with two equivalent O(9)Li2SiNi tetrahedra, and corners with two equivalent O(14)Li3Si tetrahedra. In the fifth O site, O(5) is bonded to one Li(3), one Li(7), one Ni(1), and one Si(2) atom to form OLi2SiNi tetrahedra that share  a cornercorner with one O(3)Li2SiNi tetrahedra,  a cornercorner with one O(7)Li2SiNi tetrahedra,  a cornercorner with one O(12)Li3Si tetrahedra,  a cornercorner with one O(13)Li3Si tetrahedra, corners with two equivalent O(1)Li2Si2 tetrahedra, corners with two equivalent O(10)Li2SiNi tetrahedra, corners with two equivalent O(8)Li2SiNi tetrahedra, and corners with two equivalent O(11)Li3Si tetrahedra. In the sixth O site, O(6) is bonded to one Li(4), one Li(8), one Ni(2), and one Si(1) atom to form OLi2SiNi tetrahedra that share  a cornercorner with one O(4)Li2SiNi tetrahedra,  a cornercorner with one O(8)Li2SiNi tetrahedra,  a cornercorner with one O(11)Li3Si tetrahedra,  a cornercorner with one O(14)Li3Si tetrahedra, corners with two equivalent O(2)Li2Si2 tetrahedra, corners with two equivalent O(7)Li2SiNi tetrahedra, corners with two equivalent O(9)Li2SiNi tetrahedra, and corners with two equivalent O(12)Li3Si tetrahedra. In the seventh O site, O(7) is bonded to one Li(6), one Li(7), one Ni(2), and one Si(1) atom to form distorted OLi2SiNi tetrahedra that share  a cornercorner with one O(2)Li2Si2 tetrahedra,  a cornercorner with one O(5)Li2SiNi tetrahedra,  a cornercorner with one O(9)Li2SiNi tetrahedra,  a cornercorner with one O(14)Li3Si tetrahedra, corners with two equivalent O(10)Li2SiNi tetrahedra, corners with two equivalent O(4)Li2SiNi tetrahedra, corners with two equivalent O(6)Li2SiNi tetrahedra, and corners with two equivalent O(11)Li3Si tetrahedra. In the eighth O site, O(8) is bonded to one Li(5), one Li(8), one Ni(1), and one Si(2) atom to form distorted OLi2SiNi tetrahedra that share  a cornercorner with one O(1)Li2Si2 tetrahedra,  a cornercorner with one O(10)Li2SiNi tetrahedra,  a cornercorner with one O(6)Li2SiNi tetrahedra,  a cornercorner with one O(13)Li3Si tetrahedra, corners with two equivalent O(3)Li2SiNi tetrahedra, corners with two equivalent O(5)Li2SiNi tetrahedra, corners with two equivalent O(9)Li2SiNi tetrahedra, and corners with two equivalent O(12)Li3Si tetrahedra. In the ninth O site, O(9) is bonded to one Li(5), one Li(8), one Ni(2), and one Si(3) atom to form OLi2SiNi tetrahedra that share  a cornercorner with one O(1)Li2Si2 tetrahedra,  a cornercorner with one O(3)Li2SiNi tetrahedra,  a cornercorner with one O(7)Li2SiNi tetrahedra,  a cornercorner with one O(12)Li3Si tetrahedra, corners with two equivalent O(4)Li2SiNi tetrahedra, corners with two equivalent O(6)Li2SiNi tetrahedra, corners with two equivalent O(8)Li2SiNi tetrahedra, and corners with two equivalent O(13)Li3Si tetrahedra. In the tenth O site, O(10) is bonded to one Li(6), one Li(7), one Ni(1), and one Si(4) atom to form OLi2SiNi tetrahedra that share  a cornercorner with one O(2)Li2Si2 tetrahedra,  a cornercorner with one O(4)Li2SiNi tetrahedra,  a cornercorner with one O(8)Li2SiNi tetrahedra,  a cornercorner with one O(11)Li3Si tetrahedra, corners with two equivalent O(3)Li2SiNi tetrahedra, corners with two equivalent O(5)Li2SiNi tetrahedra, corners with two equivalent O(7)Li2SiNi tetrahedra, and corners with two equivalent O(14)Li3Si tetrahedra. In the eleventh O site, O(11) is bonded to one Li(1), one Li(3), one Li(7), and one Si(1) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(1)Li2Si2 tetrahedra,  a cornercorner with one O(10)Li2SiNi tetrahedra,  a cornercorner with one O(3)Li2SiNi tetrahedra,  a cornercorner with one O(6)Li2SiNi tetrahedra, corners with two equivalent O(2)Li2Si2 tetrahedra, corners with two equivalent O(5)Li2SiNi tetrahedra, corners with two equivalent O(7)Li2SiNi tetrahedra, and corners with two equivalent O(13)Li3Si tetrahedra. In the twelfth O site, O(12) is bonded to one Li(2), one Li(4), one Li(8), and one Si(2) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(2)Li2Si2 tetrahedra,  a cornercorner with one O(4)Li2SiNi tetrahedra,  a cornercorner with one O(5)Li2SiNi tetrahedra,  a cornercorner with one O(9)Li2SiNi tetrahedra, corners with two equivalent O(1)Li2Si2 tetrahedra, corners with two equivalent O(6)Li2SiNi tetrahedra, corners with two equivalent O(8)Li2SiNi tetrahedra, and corners with two equivalent O(14)Li3Si tetrahedra. In the thirteenth O site, O(13) is bonded to one Li(1), one Li(3), one Li(5), and one Si(3) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(2)Li2Si2 tetrahedra,  a cornercorner with one O(4)Li2SiNi tetrahedra,  a cornercorner with one O(5)Li2SiNi tetrahedra,  a cornercorner with one O(8)Li2SiNi tetrahedra, corners with two equivalent O(1)Li2Si2 tetrahedra, corners with two equivalent O(3)Li2SiNi tetrahedra, corners with two equivalent O(9)Li2SiNi tetrahedra, and corners with two equivalent O(11)Li3Si tetrahedra. In the fourteenth O site, O(14) is bonded to one Li(2), one Li(4), one Li(6), and one Si(4) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(1)Li2Si2 tetrahedra,  a cornercorner with one O(3)Li2SiNi tetrahedra,  a cornercorner with one O(6)Li2SiNi tetrahedra,  a cornercorner with one O(7)Li2SiNi tetrahedra, corners with two equivalent O(2)Li2Si2 tetrahedra, corners with two equivalent O(10)Li2SiNi tetrahedra, corners with two equivalent O(4)Li2SiNi tetrahedra, and corners with two equivalent O(12)Li3Si tetrahedra.
Li4NiSi2O7 is Stannite-like 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(11), one O(13), one O(2), and one O(3) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Li(1)-O(11) bond length is 1.94 Å. The Li(1)-O(13) bond length is 1.94 Å. The Li(1)-O(2) bond length is 2.16 Å. The Li(1)-O(3) bond length is 1.98 Å. In the second Li site, Li(2) is bonded to one O(1), one O(12), one O(14), and one O(4) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The Li(2)-O(1) bond length is 2.16 Å. The Li(2)-O(12) bond length is 1.94 Å. The Li(2)-O(14) bond length is 1.94 Å. The Li(2)-O(4) bond length is 1.98 Å. In the third Li site, Li(3) 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 Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The Li(3)-O(1) bond length is 2.18 Å. The Li(3)-O(11) bond length is 1.92 Å. The Li(3)-O(13) bond length is 1.98 Å. The Li(3)-O(5) bond length is 1.98 Å. In the fourth Li site, Li(4) 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 Li(1)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Li(4)-O(12) bond length is 1.92 Å. The Li(4)-O(14) bond length is 1.98 Å. The Li(4)-O(2) bond length is 2.17 Å. The Li(4)-O(6) bond length is 1.98 Å. In the fifth Li site, Li(5) is bonded to one O(13), one O(3), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The Li(5)-O(13) bond length is 1.94 Å. The Li(5)-O(3) bond length is 2.02 Å. The Li(5)-O(8) bond length is 2.05 Å. The Li(5)-O(9) bond length is 1.98 Å. In the sixth Li site, Li(6) is bonded to one O(10), one O(14), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Li(6)-O(10) bond length is 1.99 Å. The Li(6)-O(14) bond length is 1.93 Å. The Li(6)-O(4) bond length is 2.02 Å. The Li(6)-O(7) bond length is 2.05 Å. In the seventh Li site, Li(7) is bonded to one O(10), one O(11), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Ni(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Ni(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The Li(7)-O(10) bond length is 2.06 Å. The Li(7)-O(11) bond length is 1.94 Å. The Li(7)-O(5) bond length is 1.98 Å. The Li(7)-O(7) bond length is 2.02 Å. In the eighth Li site, Li(8) is bonded to one O(12), one O(6), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Ni(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Ni(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Li(8)-O(12) bond length is 1.93 Å. The Li(8)-O(6) bond length is 1.98 Å. The Li(8)-O(8) bond length is 2.01 Å. The Li(8)-O(9) bond length is 2.06 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to one O(10), one O(3), one O(5), and one O(8) atom to form NiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Ni(1)-O(10) bond length is 2.00 Å. The Ni(1)-O(3) bond length is 1.98 Å. The Ni(1)-O(5) bond length is 2.00 Å. The Ni(1)-O(8) bond length is 1.98 Å. In the second Ni site, Ni(2) is bonded to one O(4), one O(6), one O(7), and one O(9) atom to form distorted NiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The Ni(2)-O(4) bond length is 1.98 Å. The Ni(2)-O(6) bond length is 1.99 Å. The Ni(2)-O(7) bond length is 1.98 Å. The Ni(2)-O(9) bond length is 2.00 Å. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(2), one O(6), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(7)O4 tetrahedra, and corners with two equivalent Ni(2)O4 tetrahedra. The Si(1)-O(11) bond length is 1.62 Å. The Si(1)-O(2) bond length is 1.72 Å. The Si(1)-O(6) bond length is 1.65 Å. The Si(1)-O(7) bond length is 1.64 Å. In the second Si site, Si(2) is bonded to one O(1), one O(12), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(8)O4 tetrahedra, and corners with two equivalent Ni(1)O4 tetrahedra. The Si(2)-O(1) bond length is 1.72 Å. The Si(2)-O(12) bond length is 1.62 Å. The Si(2)-O(5) bond length is 1.65 Å. The Si(2)-O(8) bond length is 1.64 Å. In the third Si site, Si(3) is bonded to one O(1), one O(13), one O(4), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(6)O4 tetrahedra,  a cornercorner with one Li(8)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(5)O4 tetrahedra, and corners with two equivalent Ni(2)O4 tetrahedra. The Si(3)-O(1) bond length is 1.72 Å. The Si(3)-O(13) bond length is 1.62 Å. The Si(3)-O(4) bond length is 1.65 Å. The Si(3)-O(9) bond length is 1.65 Å. In the fourth Si site, Si(4) is bonded to one O(10), one O(14), one O(2), and one O(3) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(5)O4 tetrahedra,  a cornercorner with one Li(7)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Li(6)O4 tetrahedra, and corners with two equivalent Ni(1)O4 tetrahedra. The Si(4)-O(10) bond length is 1.65 Å. The Si(4)-O(14) bond length is 1.62 Å. The Si(4)-O(2) bond length is 1.72 Å. The Si(4)-O(3) bond length is 1.65 Å. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded to one Li(2), one Li(3), one Si(2), and one Si(3) atom to form OLi2Si2 tetrahedra that share  a cornercorner with one O(8)Li2SiNi tetrahedra,  a cornercorner with one O(9)Li2SiNi tetrahedra,  a cornercorner with one O(11)Li3Si tetrahedra,  a cornercorner with one O(14)Li3Si tetrahedra, corners with two equivalent O(4)Li2SiNi tetrahedra, corners with two equivalent O(5)Li2SiNi tetrahedra, corners with two equivalent O(12)Li3Si tetrahedra, and corners with two equivalent O(13)Li3Si tetrahedra. In the second O site, O(2) is bonded to one Li(1), one Li(4), one Si(1), and one Si(4) atom to form OLi2Si2 tetrahedra that share  a cornercorner with one O(10)Li2SiNi tetrahedra,  a cornercorner with one O(7)Li2SiNi tetrahedra,  a cornercorner with one O(12)Li3Si tetrahedra,  a cornercorner with one O(13)Li3Si tetrahedra, corners with two equivalent O(3)Li2SiNi tetrahedra, corners with two equivalent O(6)Li2SiNi tetrahedra, corners with two equivalent O(11)Li3Si tetrahedra, and corners with two equivalent O(14)Li3Si tetrahedra. In the third O site, O(3) is bonded to one Li(1), one Li(5), one Ni(1), and one Si(4) atom to form distorted OLi2SiNi tetrahedra that share  a cornercorner with one O(5)Li2SiNi tetrahedra,  a cornercorner with one O(9)Li2SiNi tetrahedra,  a cornercorner with one O(11)Li3Si tetrahedra,  a cornercorner with one O(14)Li3Si tetrahedra, corners with two equivalent O(2)Li2Si2 tetrahedra, corners with two equivalent O(10)Li2SiNi tetrahedra, corners with two equivalent O(8)Li2SiNi tetrahedra, and corners with two equivalent O(13)Li3Si tetrahedra. In the fourth O site, O(4) is bonded to one Li(2), one Li(6), one Ni(2), and one Si(3) atom to form distorted OLi2SiNi tetrahedra that share  a cornercorner with one O(10)Li2SiNi tetrahedra,  a cornercorner with one O(6)Li2SiNi tetrahedra,  a cornercorner with one O(12)Li3Si tetrahedra,  a cornercorner with one O(13)Li3Si tetrahedra, corners with two equivalent O(1)Li2Si2 tetrahedra, corners with two equivalent O(7)Li2SiNi tetrahedra, corners with two equivalent O(9)Li2SiNi tetrahedra, and corners with two equivalent O(14)Li3Si tetrahedra. In the fifth O site, O(5) is bonded to one Li(3), one Li(7), one Ni(1), and one Si(2) atom to form OLi2SiNi tetrahedra that share  a cornercorner with one O(3)Li2SiNi tetrahedra,  a cornercorner with one O(7)Li2SiNi tetrahedra,  a cornercorner with one O(12)Li3Si tetrahedra,  a cornercorner with one O(13)Li3Si tetrahedra, corners with two equivalent O(1)Li2Si2 tetrahedra, corners with two equivalent O(10)Li2SiNi tetrahedra, corners with two equivalent O(8)Li2SiNi tetrahedra, and corners with two equivalent O(11)Li3Si tetrahedra. In the sixth O site, O(6) is bonded to one Li(4), one Li(8), one Ni(2), and one Si(1) atom to form OLi2SiNi tetrahedra that share  a cornercorner with one O(4)Li2SiNi tetrahedra,  a cornercorner with one O(8)Li2SiNi tetrahedra,  a cornercorner with one O(11)Li3Si tetrahedra,  a cornercorner with one O(14)Li3Si tetrahedra, corners with two equivalent O(2)Li2Si2 tetrahedra, corners with two equivalent O(7)Li2SiNi tetrahedra, corners with two equivalent O(9)Li2SiNi tetrahedra, and corners with two equivalent O(12)Li3Si tetrahedra. In the seventh O site, O(7) is bonded to one Li(6), one Li(7), one Ni(2), and one Si(1) atom to form distorted OLi2SiNi tetrahedra that share  a cornercorner with one O(2)Li2Si2 tetrahedra,  a cornercorner with one O(5)Li2SiNi tetrahedra,  a cornercorner with one O(9)Li2SiNi tetrahedra,  a cornercorner with one O(14)Li3Si tetrahedra, corners with two equivalent O(10)Li2SiNi tetrahedra, corners with two equivalent O(4)Li2SiNi tetrahedra, corners with two equivalent O(6)Li2SiNi tetrahedra, and corners with two equivalent O(11)Li3Si tetrahedra. In the eighth O site, O(8) is bonded to one Li(5), one Li(8), one Ni(1), and one Si(2) atom to form distorted OLi2SiNi tetrahedra that share  a cornercorner with one O(1)Li2Si2 tetrahedra,  a cornercorner with one O(10)Li2SiNi tetrahedra,  a cornercorner with one O(6)Li2SiNi tetrahedra,  a cornercorner with one O(13)Li3Si tetrahedra, corners with two equivalent O(3)Li2SiNi tetrahedra, corners with two equivalent O(5)Li2SiNi tetrahedra, corners with two equivalent O(9)Li2SiNi tetrahedra, and corners with two equivalent O(12)Li3Si tetrahedra. In the ninth O site, O(9) is bonded to one Li(5), one Li(8), one Ni(2), and one Si(3) atom to form OLi2SiNi tetrahedra that share  a cornercorner with one O(1)Li2Si2 tetrahedra,  a cornercorner with one O(3)Li2SiNi tetrahedra,  a cornercorner with one O(7)Li2SiNi tetrahedra,  a cornercorner with one O(12)Li3Si tetrahedra, corners with two equivalent O(4)Li2SiNi tetrahedra, corners with two equivalent O(6)Li2SiNi tetrahedra, corners with two equivalent O(8)Li2SiNi tetrahedra, and corners with two equivalent O(13)Li3Si tetrahedra. In the tenth O site, O(10) is bonded to one Li(6), one Li(7), one Ni(1), and one Si(4) atom to form OLi2SiNi tetrahedra that share  a cornercorner with one O(2)Li2Si2 tetrahedra,  a cornercorner with one O(4)Li2SiNi tetrahedra,  a cornercorner with one O(8)Li2SiNi tetrahedra,  a cornercorner with one O(11)Li3Si tetrahedra, corners with two equivalent O(3)Li2SiNi tetrahedra, corners with two equivalent O(5)Li2SiNi tetrahedra, corners with two equivalent O(7)Li2SiNi tetrahedra, and corners with two equivalent O(14)Li3Si tetrahedra. In the eleventh O site, O(11) is bonded to one Li(1), one Li(3), one Li(7), and one Si(1) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(1)Li2Si2 tetrahedra,  a cornercorner with one O(10)Li2SiNi tetrahedra,  a cornercorner with one O(3)Li2SiNi tetrahedra,  a cornercorner with one O(6)Li2SiNi tetrahedra, corners with two equivalent O(2)Li2Si2 tetrahedra, corners with two equivalent O(5)Li2SiNi tetrahedra, corners with two equivalent O(7)Li2SiNi tetrahedra, and corners with two equivalent O(13)Li3Si tetrahedra. In the twelfth O site, O(12) is bonded to one Li(2), one Li(4), one Li(8), and one Si(2) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(2)Li2Si2 tetrahedra,  a cornercorner with one O(4)Li2SiNi tetrahedra,  a cornercorner with one O(5)Li2SiNi tetrahedra,  a cornercorner with one O(9)Li2SiNi tetrahedra, corners with two equivalent O(1)Li2Si2 tetrahedra, corners with two equivalent O(6)Li2SiNi tetrahedra, corners with two equivalent O(8)Li2SiNi tetrahedra, and corners with two equivalent O(14)Li3Si tetrahedra. In the thirteenth O site, O(13) is bonded to one Li(1), one Li(3), one Li(5), and one Si(3) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(2)Li2Si2 tetrahedra,  a cornercorner with one O(4)Li2SiNi tetrahedra,  a cornercorner with one O(5)Li2SiNi tetrahedra,  a cornercorner with one O(8)Li2SiNi tetrahedra, corners with two equivalent O(1)Li2Si2 tetrahedra, corners with two equivalent O(3)Li2SiNi tetrahedra, corners with two equivalent O(9)Li2SiNi tetrahedra, and corners with two equivalent O(11)Li3Si tetrahedra. In the fourteenth O site, O(14) is bonded to one Li(2), one Li(4), one Li(6), and one Si(4) atom to form OLi3Si tetrahedra that share  a cornercorner with one O(1)Li2Si2 tetrahedra,  a cornercorner with one O(3)Li2SiNi tetrahedra,  a cornercorner with one O(6)Li2SiNi tetrahedra,  a cornercorner with one O(7)Li2SiNi tetrahedra, corners with two equivalent O(2)Li2Si2 tetrahedra, corners with two equivalent O(10)Li2SiNi tetrahedra, corners with two equivalent O(4)Li2SiNi tetrahedra, and corners with two equivalent O(12)Li3Si tetrahedra.