Ga3PO7 crystallizes in the trigonal R3m space group. Ga(1) is bonded to one O(1), one O(3), and three equivalent O(2) atoms to form GaO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent Ga(1)O5 trigonal bipyramids, and edges with two equivalent Ga(1)O5 trigonal bipyramids. P(1) is bonded to one O(3) and three equivalent O(1) atoms to form PO4 tetrahedra that share corners with six equivalent Ga(1)O5 trigonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ga(1) and one P(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent Ga(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Ga(1) and one P(1) atom.
Ga3PO7 crystallizes in the trigonal R3m space group. Ga(1) is bonded to one O(1), one O(3), and three equivalent O(2) atoms to form GaO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent Ga(1)O5 trigonal bipyramids, and edges with two equivalent Ga(1)O5 trigonal bipyramids. The Ga(1)-O(1) bond length is 1.88 Å. The Ga(1)-O(3) bond length is 2.14 Å. There is one shorter (1.87 Å) and two longer (1.89 Å) Ga(1)-O(2) bond lengths. P(1) is bonded to one O(3) and three equivalent O(1) atoms to form PO4 tetrahedra that share corners with six equivalent Ga(1)O5 trigonal bipyramids. The P(1)-O(3) bond length is 1.58 Å. All P(1)-O(1) bond lengths are 1.51 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ga(1) and one P(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent Ga(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Ga(1) and one P(1) atom.