CsGaP3HO10 crystallizes in the monoclinic C2 space group. Cs(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Ga(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form GaO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra and corners with four equivalent P(1)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form PO4 tetrahedra that share corners with two equivalent Ga(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-49°. In the second P site, P(2) is bonded to two equivalent O(2) and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Ga(1)O6 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. H(1) is bonded in a linear geometry to two equivalent O(1) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one P(1), and one H(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cs(1), one Ga(1), and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Cs(1), one Ga(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Cs(1), one P(1), and one P(2) atom.
CsGaP3HO10 crystallizes in the monoclinic C2 space group. Cs(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Both Cs(1)-O(1) bond lengths are 3.05 Å. Both Cs(1)-O(2) bond lengths are 3.22 Å. Both Cs(1)-O(3) bond lengths are 3.26 Å. Both Cs(1)-O(4) bond lengths are 3.41 Å. Both Cs(1)-O(5) bond lengths are 3.67 Å. Ga(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form GaO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra and corners with four equivalent P(1)O4 tetrahedra. Both Ga(1)-O(2) bond lengths are 1.98 Å. Both Ga(1)-O(3) bond lengths are 1.96 Å. Both Ga(1)-O(4) bond lengths are 1.93 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form PO4 tetrahedra that share corners with two equivalent Ga(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-49°. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.51 Å. The P(1)-O(4) bond length is 1.49 Å. The P(1)-O(5) bond length is 1.63 Å. In the second P site, P(2) is bonded to two equivalent O(2) and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Ga(1)O6 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. Both P(2)-O(2) bond lengths are 1.49 Å. Both P(2)-O(5) bond lengths are 1.58 Å. H(1) is bonded in a linear geometry to two equivalent O(1) atoms. Both H(1)-O(1) bond lengths are 1.20 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one P(1), and one H(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Cs(1), one Ga(1), and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one Ga(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Cs(1), one Ga(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Cs(1), one P(1), and one P(2) atom.