NaSn2(PO4)3 crystallizes in the trigonal R-3c space group. Na(1) is bonded in a distorted hexagonal planar geometry to six equivalent O(1) atoms. Sn(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form SnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. 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 Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-39°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Sn(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom.
NaSn2(PO4)3 crystallizes in the trigonal R-3c space group. Na(1) is bonded in a distorted hexagonal planar geometry to six equivalent O(1) atoms. All Na(1)-O(1) bond lengths are 2.48 Å. Sn(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form SnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. All Sn(1)-O(1) bond lengths are 2.07 Å. All Sn(1)-O(2) bond lengths are 2.04 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 Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-39°. Both P(1)-O(1) bond lengths are 1.55 Å. Both P(1)-O(2) bond lengths are 1.54 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Sn(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom.