GaPHO3F2 crystallizes in the trigonal R-3 space group. Ga(1) is bonded to one O(1), one O(2), one O(3), one F(2), and two equivalent F(1) atoms to form GaO3F3 octahedra that share corners with three equivalent P(1)HO3 tetrahedra and  an edgeedge with one Ga(1)O3F3 octahedra. The Ga(1)-O(1) bond length is 1.94 Å. The Ga(1)-O(2) bond length is 1.91 Å. The Ga(1)-O(3) bond length is 1.95 Å. The Ga(1)-F(2) bond length is 1.85 Å. There is one shorter (1.97 Å) and one longer (2.00 Å) Ga(1)-F(1) bond length. P(1) is bonded to one H(1), one O(1), one O(2), and one O(3) atom to form distorted PHO3 tetrahedra that share corners with three equivalent Ga(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 50-52°. The P(1)-H(1) bond length is 1.44 Å. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(2) bond length is 1.53 Å. The P(1)-O(3) bond length is 1.53 Å. H(1) is bonded in a single-bond geometry to one P(1) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Ga(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Ga(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ga(1) and one P(1) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a water-like geometry to two equivalent Ga(1) atoms. In the second F site, F(2) is bonded in a single-bond geometry to one Ga(1) atom. Linkers: 18 [O][PH]([O])=O. Metal clusters: 18 [Ga]. The MOF has largest included sphere 5.46 A, density 1.50 g/cm3, surface area 2650.03 m2/g, accessible volume 0.39 cm3/g