Ga3P4H4(O3F)4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(2), one O(3), one O(6), one F(1), and one F(2) atom to form GaO4F2 octahedra that share  a cornercorner with one Ga(2)O4F2 octahedra, corners with two equivalent P(1)HO3 tetrahedra, and corners with two equivalent P(2)HO3 tetrahedra. The corner-sharing octahedral tilt angles are 47°. The Ga(1)-O(1) bond length is 1.97 Å. The Ga(1)-O(2) bond length is 1.96 Å. The Ga(1)-O(3) bond length is 1.94 Å. The Ga(1)-O(6) bond length is 1.95 Å. The Ga(1)-F(1) bond length is 1.97 Å. The Ga(1)-F(2) bond length is 1.87 Å. In the second Ga site, Ga(2) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent F(1) atoms to form GaO4F2 octahedra that share corners with two equivalent Ga(1)O4F2 octahedra, corners with two equivalent P(1)HO3 tetrahedra, and corners with two equivalent P(2)HO3 tetrahedra. The corner-sharing octahedral tilt angles are 47°. Both Ga(2)-O(4) bond lengths are 1.93 Å. Both Ga(2)-O(5) bond lengths are 1.95 Å. Both Ga(2)-F(1) bond lengths are 1.95 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one H(2), one O(1), one O(5), and one O(6) atom to form distorted PHO3 tetrahedra that share  a cornercorner with one Ga(2)O4F2 octahedra and corners with two equivalent Ga(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-45°. The P(1)-H(2) bond length is 1.34 Å. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(5) bond length is 1.51 Å. The P(1)-O(6) bond length is 1.52 Å. In the second P site, P(2) is bonded to one H(1), one O(2), one O(3), and one O(4) atom to form PHO3 tetrahedra that share  a cornercorner with one Ga(2)O4F2 octahedra and corners with two equivalent Ga(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 46-48°. The P(2)-H(1) bond length is 1.33 Å. The P(2)-O(2) bond length is 1.52 Å. The P(2)-O(3) bond length is 1.52 Å. The P(2)-O(4) bond length is 1.52 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(1) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to 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 Ga(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ga(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Ga(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 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 bent 120 degrees geometry to one Ga(1) and one Ga(2) atom. In the second F site, F(2) is bonded in a single-bond geometry to one Ga(1) atom. Linkers: 16 [O][PH]([O])=O. Metal clusters: 12 [Ga]. The MOF has largest included sphere 4.26 A, density 2.19 g/cm3, surface area 2535.26 m2/g, accessible volume 0.17 cm3/g