SnOP2O5 crystallizes in the orthorhombic C222_1 space group. Sn(1) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form SnO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent Sn(1)O4 tetrahedra. In the second P site, P(2) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(1)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. In the third P site, P(3) is bonded to two equivalent O(1) and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(1)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(3) atom. In the second O site, O(6) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the third O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fifth O site, O(3) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(1) atom.
SnOP2O5 crystallizes in the orthorhombic C222_1 space group. Sn(1) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form SnO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The Sn(1)-O(2) bond length is 2.29 Å. The Sn(1)-O(4) bond length is 2.40 Å. The Sn(1)-O(5) bond length is 2.39 Å. The Sn(1)-O(6) bond length is 2.32 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent Sn(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.61 Å. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.62 Å. The P(1)-O(4) bond length is 1.50 Å. In the second P site, P(2) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(1)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. Both P(2)-O(3) bond lengths are 1.61 Å. Both P(2)-O(6) bond lengths are 1.50 Å. In the third P site, P(3) is bonded to two equivalent O(1) and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(1)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. Both P(3)-O(1) bond lengths are 1.63 Å. Both P(3)-O(5) bond lengths are 1.50 Å. There are six inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(3) atom. In the second O site, O(6) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the third O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fifth O site, O(3) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(1) atom.