NaSn2(PO4)3 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(9) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(11), one O(3), one O(4), one O(5), and one O(6) atom to form SnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Sn site, Sn(2) is bonded to one O(10), one O(12), one O(2), one O(7), one O(8), and one O(9) atom to form SnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-45°. In the second P site, P(2) is bonded to one O(1), one O(10), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-43°. In the third P site, P(3) is bonded to one O(11), one O(12), one O(5), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-42°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Sn(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Sn(2), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Sn(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1), one Sn(1), and one P(3) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Sn(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Sn(2) and one P(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Na(1), one Sn(2), and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Sn(2) and one P(2) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Sn(2) and one P(3) atom.
NaSn2(PO4)3 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(9) atom. The Na(1)-O(1) bond length is 2.19 Å. The Na(1)-O(2) bond length is 2.22 Å. The Na(1)-O(4) bond length is 2.44 Å. The Na(1)-O(5) bond length is 2.35 Å. The Na(1)-O(9) bond length is 2.22 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(1), one O(11), one O(3), one O(4), one O(5), and one O(6) atom to form SnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The Sn(1)-O(1) bond length is 2.10 Å. The Sn(1)-O(11) bond length is 2.03 Å. The Sn(1)-O(3) bond length is 2.04 Å. The Sn(1)-O(4) bond length is 2.07 Å. The Sn(1)-O(5) bond length is 2.10 Å. The Sn(1)-O(6) bond length is 2.03 Å. In the second Sn site, Sn(2) is bonded to one O(10), one O(12), one O(2), one O(7), one O(8), and one O(9) atom to form SnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The Sn(2)-O(10) bond length is 2.05 Å. The Sn(2)-O(12) bond length is 2.04 Å. The Sn(2)-O(2) bond length is 2.08 Å. The Sn(2)-O(7) bond length is 2.08 Å. The Sn(2)-O(8) bond length is 2.06 Å. The Sn(2)-O(9) bond length is 2.10 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-45°. The P(1)-O(2) bond length is 1.56 Å. The P(1)-O(3) bond length is 1.52 Å. The P(1)-O(4) bond length is 1.56 Å. The P(1)-O(7) bond length is 1.54 Å. In the second P site, P(2) is bonded to one O(1), one O(10), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-43°. The P(2)-O(1) bond length is 1.56 Å. The P(2)-O(10) bond length is 1.54 Å. The P(2)-O(6) bond length is 1.54 Å. The P(2)-O(8) bond length is 1.54 Å. In the third P site, P(3) is bonded to one O(11), one O(12), one O(5), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra and corners with two equivalent Sn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-42°. The P(3)-O(11) bond length is 1.54 Å. The P(3)-O(12) bond length is 1.53 Å. The P(3)-O(5) bond length is 1.56 Å. The P(3)-O(9) bond length is 1.56 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(1), one Sn(1), and one P(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Sn(2), and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Sn(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Na(1), one Sn(1), and one P(3) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Sn(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Sn(2) and one P(2) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Na(1), one Sn(2), and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one Sn(2) and one P(2) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one Sn(2) and one P(3) atom.