NaGe2P3O12 crystallizes in the trigonal R-3c space group. Na(1) is bonded in a hexagonal planar geometry to six equivalent O(1) atoms. Ge(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form GeO6 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 Ge(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-35°. 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 Ge(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ge(1) and one P(1) atom.
NaGe2P3O12 crystallizes in the trigonal R-3c space group. Na(1) is bonded in a hexagonal planar geometry to six equivalent O(1) atoms. All Na(1)-O(1) bond lengths are 2.43 Å. Ge(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form GeO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. All Ge(1)-O(1) bond lengths are 1.90 Å. All Ge(1)-O(2) bond lengths are 1.87 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 Ge(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-35°. Both P(1)-O(1) bond lengths are 1.54 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 Ge(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ge(1) and one P(1) atom.