Li2Cr(SiO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(12), one O(2), one O(4), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the third Li site, Li(3) is bonded to one O(10), one O(11), one O(6), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the fourth Li site, Li(4) is bonded to one O(1), one O(11), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form distorted CrO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. In the second Cr site, Cr(2) is bonded to one O(1), one O(11), one O(12), and one O(2) atom to form distorted CrO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(4), one Cr(2), and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Cr(2), and one Si(1) atom to form corner-sharing OLi2CrSi tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Li(2), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(1), one Li(2), one Cr(1), and one Si(2) atom to form corner-sharing OLi2CrSi tetrahedra. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(3), one Cr(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Cr(1), and one Si(3) atom. In the eighth O site, O(8) is bonded to one Li(3), one Li(4), one Cr(1), and one Si(3) atom to form corner-sharing OLi2CrSi tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Li(4), one Si(3), and one Si(4) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Li(3), one Si(3), and one Si(4) atom. In the eleventh O site, O(11) is bonded to one Li(3), one Li(4), one Cr(2), and one Si(4) atom to form corner-sharing OLi2CrSi tetrahedra. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Li(1), one Cr(2), and one Si(4) atom.
Li2Cr(SiO3)2 crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(12), one O(2), one O(4), and one O(5) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Li(1)-O(12) bond length is 1.95 Å. The Li(1)-O(2) bond length is 1.98 Å. The Li(1)-O(4) bond length is 2.25 Å. The Li(1)-O(5) bond length is 1.95 Å. In the second Li site, Li(2) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Li(2)-O(2) bond length is 1.95 Å. The Li(2)-O(3) bond length is 2.26 Å. The Li(2)-O(5) bond length is 1.99 Å. The Li(2)-O(7) bond length is 1.96 Å. In the third Li site, Li(3) is bonded to one O(10), one O(11), one O(6), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Li(3)-O(10) bond length is 2.26 Å. The Li(3)-O(11) bond length is 1.95 Å. The Li(3)-O(6) bond length is 1.96 Å. The Li(3)-O(8) bond length is 1.98 Å. In the fourth Li site, Li(4) is bonded to one O(1), one O(11), one O(8), and one O(9) atom to form LiO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Li(4)-O(1) bond length is 1.95 Å. The Li(4)-O(11) bond length is 1.98 Å. The Li(4)-O(8) bond length is 1.95 Å. The Li(4)-O(9) bond length is 2.25 Å. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form distorted CrO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The Cr(1)-O(5) bond length is 2.15 Å. The Cr(1)-O(6) bond length is 2.01 Å. The Cr(1)-O(7) bond length is 2.01 Å. The Cr(1)-O(8) bond length is 2.16 Å. In the second Cr site, Cr(2) is bonded to one O(1), one O(11), one O(12), and one O(2) atom to form distorted CrO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Cr(2)-O(1) bond length is 2.01 Å. The Cr(2)-O(11) bond length is 2.16 Å. The Cr(2)-O(12) bond length is 2.01 Å. The Cr(2)-O(2) bond length is 2.15 Å. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(4)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Si(2)O4 tetrahedra. The Si(1)-O(1) bond length is 1.62 Å. The Si(1)-O(2) bond length is 1.63 Å. The Si(1)-O(3) bond length is 1.68 Å. The Si(1)-O(4) bond length is 1.67 Å. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(3)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Si(1)O4 tetrahedra. The Si(2)-O(3) bond length is 1.67 Å. The Si(2)-O(4) bond length is 1.68 Å. The Si(2)-O(5) bond length is 1.63 Å. The Si(2)-O(6) bond length is 1.62 Å. In the third Si site, Si(3) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(1)O4 tetrahedra, and corners with two equivalent Si(4)O4 tetrahedra. The Si(3)-O(10) bond length is 1.67 Å. The Si(3)-O(7) bond length is 1.62 Å. The Si(3)-O(8) bond length is 1.63 Å. The Si(3)-O(9) bond length is 1.68 Å. In the fourth Si site, Si(4) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra, corners with two equivalent Li(3)O4 tetrahedra, corners with two equivalent Li(4)O4 tetrahedra, corners with two equivalent Cr(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The Si(4)-O(10) bond length is 1.68 Å. The Si(4)-O(11) bond length is 1.63 Å. The Si(4)-O(12) bond length is 1.62 Å. The Si(4)-O(9) bond length is 1.67 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(4), one Cr(2), and one Si(1) atom. In the second O site, O(2) is bonded to one Li(1), one Li(2), one Cr(2), and one Si(1) atom to form corner-sharing OLi2CrSi tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Li(2), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Li(1), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Li(1), one Li(2), one Cr(1), and one Si(2) atom to form corner-sharing OLi2CrSi tetrahedra. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(3), one Cr(1), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Cr(1), and one Si(3) atom. In the eighth O site, O(8) is bonded to one Li(3), one Li(4), one Cr(1), and one Si(3) atom to form corner-sharing OLi2CrSi tetrahedra. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Li(4), one Si(3), and one Si(4) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Li(3), one Si(3), and one Si(4) atom. In the eleventh O site, O(11) is bonded to one Li(3), one Li(4), one Cr(2), and one Si(4) atom to form corner-sharing OLi2CrSi tetrahedra. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Li(1), one Cr(2), and one Si(4) atom.