Li2Sn(PO3)4 crystallizes in the tetragonal P4/nbm space group. Li(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form LiO6 octahedra that share corners with eight equivalent P(1)O4 tetrahedra. Sn(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. P(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with four equivalent Li(1)O6 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-73°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Li(1) and two equivalent P(1) atoms.
Li2Sn(PO3)4 crystallizes in the tetragonal P4/nbm space group. Li(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form LiO6 octahedra that share corners with eight equivalent P(1)O4 tetrahedra. Both Li(1)-O(2) bond lengths are 2.58 Å. All Li(1)-O(1) bond lengths are 2.18 Å. Sn(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. All Sn(1)-O(1) bond lengths are 2.57 Å. P(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with four equivalent Li(1)O6 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-73°. Both P(1)-O(1) bond lengths are 1.50 Å. Both P(1)-O(2) bond lengths are 1.64 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Li(1), one Sn(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Li(1) and two equivalent P(1) atoms.