In7P8H4(O4F)8 crystallizes in the monoclinic C2/m space group. There are five inequivalent In sites. In the first In site, In(1) is bonded to two equivalent O(1), two equivalent O(2), one F(1), and one F(2) atom to form InO4F2 octahedra that share corners with four equivalent P(2)O4 tetrahedra. Both In(1)-O(1) bond lengths are 2.10 Å. Both In(1)-O(2) bond lengths are 2.13 Å. The In(1)-F(1) bond length is 2.06 Å. The In(1)-F(2) bond length is 2.16 Å. In the second In site, In(2) is bonded to two equivalent O(3), two equivalent O(4), one F(3), and one F(4) atom to form InO4F2 octahedra that share  a cornercorner with one In(3)O4F2 octahedra,  a cornercorner with one In(4)O4F2 octahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 54-58°. Both In(2)-O(3) bond lengths are 2.09 Å. Both In(2)-O(4) bond lengths are 2.13 Å. The In(2)-F(3) bond length is 2.10 Å. The In(2)-F(4) bond length is 2.12 Å. In the third In site, In(3) is bonded to four equivalent O(5) and two equivalent F(3) atoms to form InO4F2 octahedra that share corners with two equivalent In(2)O4F2 octahedra and corners with four equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. All In(3)-O(5) bond lengths are 2.09 Å. Both In(3)-F(3) bond lengths are 2.12 Å. In the fourth In site, In(4) is bonded to four equivalent O(6) and two equivalent F(4) atoms to form InO4F2 octahedra that share corners with two equivalent In(2)O4F2 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. All In(4)-O(6) bond lengths are 2.12 Å. Both In(4)-F(4) bond lengths are 2.11 Å. In the fifth In site, In(5) is bonded in a square co-planar geometry to four equivalent O(7) atoms. All In(5)-O(7) bond lengths are 2.19 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(4), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one In(2)O4F2 octahedra and  a cornercorner with one In(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-53°. The P(1)-O(4) bond length is 1.50 Å. The P(1)-O(6) bond length is 1.51 Å. The P(1)-O(7) bond length is 1.51 Å. The P(1)-O(8) bond length is 1.53 Å. In the second P site, P(2) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one In(2)O4F2 octahedra,  a cornercorner with one In(3)O4F2 octahedra, and corners with two equivalent In(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 41-49°. The P(2)-O(1) bond length is 1.52 Å. The P(2)-O(2) bond length is 1.54 Å. The P(2)-O(3) bond length is 1.52 Å. The P(2)-O(5) bond length is 1.53 Å. H(1) is bonded in a single-bond geometry to one O(8) atom. The H(1)-O(8) bond length is 0.82 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(2) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one In(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one In(3) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one In(4) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one In(5) and one P(1) atom. In the eighth O site, O(8) is bonded in a water-like geometry to one P(1) and one H(1) atom. There are four inequivalent F sites. In the first F site, F(1) is bonded in a single-bond geometry to one In(1) atom. In the second F site, F(2) is bonded in a single-bond geometry to one In(1) atom. In the third F site, F(3) is bonded in a bent 120 degrees geometry to one In(2) and one In(3) atom. In the fourth F site, F(4) is bonded in a bent 120 degrees geometry to one In(2) and one In(4) atom. Linkers: 8 [O]P([O])([O])=O ,8 [O]P([O])(=O)O. Metal clusters: 14 [In]. The MOF has largest included sphere 4.95 A, density 2.31 g/cm3, surface area 2183.84 m2/g, accessible volume 0.20 cm3/g