K2SnO6 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. Sn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form SnO6 octahedra that share corners with two equivalent O(2)K2SnO tetrahedra and edges with two equivalent Sn(1)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one O(1) atom. In the second O site, O(2) is bonded to two equivalent K(1), one Sn(1), and one O(2) atom to form OK2SnO tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra and corners with three equivalent O(2)K2SnO tetrahedra. The corner-sharing octahedral tilt angles are 67°. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Sn(1) atoms.
K2SnO6 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and three equivalent O(1) atoms. Both K(1)-O(2) bond lengths are 2.66 Å. There is one shorter (2.66 Å) and one longer (3.05 Å) K(1)-O(3) bond length. There are a spread of K(1)-O(1) bond distances ranging from 2.80-3.02 Å. Sn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form SnO6 octahedra that share corners with two equivalent O(2)K2SnO tetrahedra and edges with two equivalent Sn(1)O6 octahedra. Both Sn(1)-O(2) bond lengths are 2.20 Å. There are two shorter (2.10 Å) and two longer (2.12 Å) Sn(1)-O(3) bond lengths. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one O(1) atom. The O(1)-O(1) bond length is 1.30 Å. In the second O site, O(2) is bonded to two equivalent K(1), one Sn(1), and one O(2) atom to form OK2SnO tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra and corners with three equivalent O(2)K2SnO tetrahedra. The corner-sharing octahedral tilt angles are 67°. The O(2)-O(2) bond length is 1.39 Å. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Sn(1) atoms.