Li2CoSn(PO4)2 crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(12), one O(2), and one O(9) atom. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(11), and one O(2) atom. In the third Li site, Li(3) is bonded to one O(14), one O(15), one O(5), one O(6), one O(7), and one O(8) atom to form LiO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, edges with two equivalent Li(4)O6 octahedra,  an edgeedge with one P(3)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-69°. In the fourth Li site, Li(4) is bonded to one O(13), one O(16), one O(5), one O(6), one O(7), and one O(8) atom to form LiO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, edges with two equivalent Li(3)O6 octahedra,  an edgeedge with one P(3)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-70°. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(11), one O(12), one O(15), one O(16), one O(4), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Li(3)O6 octahedra, corners with two equivalent Li(4)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-70°. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(14), one O(3), one O(7), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Li(3)O6 octahedra, corners with two equivalent Li(4)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-70°. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(13), one O(14), one O(5), and one O(9) atom. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to one O(11), one O(12), one O(15), one O(16), one O(2), and one O(6) atom. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(2), one O(3), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles are 46°. In the second P site, P(2) is bonded to one O(1), one O(11), one O(12), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 45°. In the third P site, P(3) is bonded to one O(13), one O(14), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Li(3)O6 octahedra,  a cornercorner with one Li(4)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra, and  an edgeedge with one Li(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-58°. In the fourth P site, P(4) is bonded to one O(15), one O(16), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(3)O6 octahedra,  a cornercorner with one Li(4)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra, and  an edgeedge with one Li(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-58°. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Sn(1), and one P(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Sn(2), and one P(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Co(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Co(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Li(3), one Li(4), one Sn(1), and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Li(3), one Li(4), one Sn(2), and one P(4) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Li(3), one Li(4), one Co(2), and one P(4) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Li(3), one Li(4), one Co(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Co(2), one Sn(1), and one P(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Li(2), one Co(2), one Sn(1), and one P(1) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(2), one Co(1), one Sn(2), and one P(2) atom. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Co(1), one Sn(2), and one P(2) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Li(4), one Co(2), one Sn(1), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Li(3), one Co(2), one Sn(1), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Li(3), one Co(1), one Sn(2), and one P(4) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Li(4), one Co(1), one Sn(2), and one P(4) atom.
Li2CoSn(PO4)2 crystallizes in the triclinic P1 space group. There are four inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(12), one O(2), and one O(9) atom. The Li(1)-O(1) bond length is 2.05 Å. The Li(1)-O(12) bond length is 2.18 Å. The Li(1)-O(2) bond length is 2.05 Å. The Li(1)-O(9) bond length is 2.18 Å. In the second Li site, Li(2) is bonded in a 4-coordinate geometry to one O(1), one O(10), one O(11), and one O(2) atom. The Li(2)-O(1) bond length is 1.96 Å. The Li(2)-O(10) bond length is 2.35 Å. The Li(2)-O(11) bond length is 2.39 Å. The Li(2)-O(2) bond length is 1.97 Å. In the third Li site, Li(3) is bonded to one O(14), one O(15), one O(5), one O(6), one O(7), and one O(8) atom to form LiO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, edges with two equivalent Li(4)O6 octahedra,  an edgeedge with one P(3)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-69°. The Li(3)-O(14) bond length is 2.11 Å. The Li(3)-O(15) bond length is 2.11 Å. The Li(3)-O(5) bond length is 2.19 Å. The Li(3)-O(6) bond length is 2.18 Å. The Li(3)-O(7) bond length is 2.31 Å. The Li(3)-O(8) bond length is 2.30 Å. In the fourth Li site, Li(4) is bonded to one O(13), one O(16), one O(5), one O(6), one O(7), and one O(8) atom to form LiO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, edges with two equivalent Li(3)O6 octahedra,  an edgeedge with one P(3)O4 tetrahedra, and  an edgeedge with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-70°. The Li(4)-O(13) bond length is 2.14 Å. The Li(4)-O(16) bond length is 2.14 Å. The Li(4)-O(5) bond length is 2.26 Å. The Li(4)-O(6) bond length is 2.26 Å. The Li(4)-O(7) bond length is 2.19 Å. The Li(4)-O(8) bond length is 2.19 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(11), one O(12), one O(15), one O(16), one O(4), and one O(8) atom to form CoO6 octahedra that share corners with two equivalent Li(3)O6 octahedra, corners with two equivalent Li(4)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(4)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-70°. The Co(1)-O(11) bond length is 2.15 Å. The Co(1)-O(12) bond length is 2.25 Å. The Co(1)-O(15) bond length is 2.17 Å. The Co(1)-O(16) bond length is 2.18 Å. The Co(1)-O(4) bond length is 2.15 Å. The Co(1)-O(8) bond length is 2.11 Å. In the second Co site, Co(2) is bonded to one O(10), one O(13), one O(14), one O(3), one O(7), and one O(9) atom to form CoO6 octahedra that share corners with two equivalent Li(3)O6 octahedra, corners with two equivalent Li(4)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-70°. The Co(2)-O(10) bond length is 2.15 Å. The Co(2)-O(13) bond length is 2.18 Å. The Co(2)-O(14) bond length is 2.17 Å. The Co(2)-O(3) bond length is 2.17 Å. The Co(2)-O(7) bond length is 2.11 Å. The Co(2)-O(9) bond length is 2.24 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(13), one O(14), one O(5), and one O(9) atom. The Sn(1)-O(1) bond length is 2.72 Å. The Sn(1)-O(10) bond length is 2.37 Å. The Sn(1)-O(13) bond length is 2.45 Å. The Sn(1)-O(14) bond length is 2.47 Å. The Sn(1)-O(5) bond length is 2.47 Å. The Sn(1)-O(9) bond length is 2.42 Å. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to one O(11), one O(12), one O(15), one O(16), one O(2), and one O(6) atom. The Sn(2)-O(11) bond length is 2.38 Å. The Sn(2)-O(12) bond length is 2.43 Å. The Sn(2)-O(15) bond length is 2.47 Å. The Sn(2)-O(16) bond length is 2.45 Å. The Sn(2)-O(2) bond length is 2.73 Å. The Sn(2)-O(6) bond length is 2.48 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(2), one O(3), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O6 octahedra and  an edgeedge with one Co(2)O6 octahedra. The corner-sharing octahedral tilt angles are 46°. The P(1)-O(10) bond length is 1.58 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.54 Å. The P(1)-O(9) bond length is 1.58 Å. In the second P site, P(2) is bonded to one O(1), one O(11), one O(12), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 45°. The P(2)-O(1) bond length is 1.55 Å. The P(2)-O(11) bond length is 1.58 Å. The P(2)-O(12) bond length is 1.57 Å. The P(2)-O(4) bond length is 1.54 Å. In the third P site, P(3) is bonded to one O(13), one O(14), one O(5), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Li(3)O6 octahedra,  a cornercorner with one Li(4)O6 octahedra,  a cornercorner with one Co(1)O6 octahedra, corners with two equivalent Co(2)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra, and  an edgeedge with one Li(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-58°. The P(3)-O(13) bond length is 1.58 Å. The P(3)-O(14) bond length is 1.58 Å. The P(3)-O(5) bond length is 1.55 Å. The P(3)-O(8) bond length is 1.55 Å. In the fourth P site, P(4) is bonded to one O(15), one O(16), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Li(3)O6 octahedra,  a cornercorner with one Li(4)O6 octahedra,  a cornercorner with one Co(2)O6 octahedra, corners with two equivalent Co(1)O6 octahedra,  an edgeedge with one Li(3)O6 octahedra, and  an edgeedge with one Li(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-58°. The P(4)-O(15) bond length is 1.58 Å. The P(4)-O(16) bond length is 1.58 Å. The P(4)-O(6) bond length is 1.55 Å. The P(4)-O(7) bond length is 1.55 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Sn(1), and one P(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(1), one Li(2), one Sn(2), and one P(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Co(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Co(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Li(3), one Li(4), one Sn(1), and one P(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Li(3), one Li(4), one Sn(2), and one P(4) atom. In the seventh O site, O(7) is bonded in a rectangular see-saw-like geometry to one Li(3), one Li(4), one Co(2), and one P(4) atom. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Li(3), one Li(4), one Co(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Co(2), one Sn(1), and one P(1) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Li(2), one Co(2), one Sn(1), and one P(1) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Li(2), one Co(1), one Sn(2), and one P(2) atom. In the twelfth O site, O(12) is bonded in a distorted rectangular see-saw-like geometry to one Li(1), one Co(1), one Sn(2), and one P(2) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Li(4), one Co(2), one Sn(1), and one P(3) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Li(3), one Co(2), one Sn(1), and one P(3) atom. In the fifteenth O site, O(15) is bonded in a 4-coordinate geometry to one Li(3), one Co(1), one Sn(2), and one P(4) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Li(4), one Co(1), one Sn(2), and one P(4) atom.