In2P3(CO8)2 crystallizes in the monoclinic P2_1 space group. There are two inequivalent In sites. In the first In site, In(1) is bonded to one O(1), one O(13), one O(15), one O(2), one O(5), and one O(9) atom to form InO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The In(1)-O(1) bond length is 2.11 Å. The In(1)-O(13) bond length is 2.20 Å. The In(1)-O(15) bond length is 2.21 Å. The In(1)-O(2) bond length is 2.14 Å. The In(1)-O(5) bond length is 2.05 Å. The In(1)-O(9) bond length is 2.16 Å. In the second In site, In(2) is bonded to one O(12), one O(14), one O(16), one O(3), one O(7), and one O(8) atom to form InO6 octahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The In(2)-O(12) bond length is 2.15 Å. The In(2)-O(14) bond length is 2.24 Å. The In(2)-O(16) bond length is 2.19 Å. The In(2)-O(3) bond length is 2.10 Å. The In(2)-O(7) bond length is 2.09 Å. The In(2)-O(8) bond length is 2.14 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(13) and one O(14) atom. The C(1)-O(13) bond length is 1.26 Å. The C(1)-O(14) bond length is 1.24 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(15) and one O(16) atom. The C(2)-O(15) bond length is 1.26 Å. The C(2)-O(16) bond length is 1.25 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one In(2)O6 octahedra and corners with two equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 44-53°. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.52 Å. The P(1)-O(4) bond length is 1.55 Å. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one In(1)O6 octahedra and corners with two equivalent In(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-48°. The P(2)-O(5) bond length is 1.53 Å. The P(2)-O(6) bond length is 1.55 Å. The P(2)-O(7) bond length is 1.52 Å. The P(2)-O(8) bond length is 1.54 Å. In the third P site, P(3) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one In(1)O6 octahedra and  a cornercorner with one In(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-52°. The P(3)-O(10) bond length is 1.53 Å. The P(3)-O(11) bond length is 1.58 Å. The P(3)-O(12) bond length is 1.53 Å. The P(3)-O(9) bond length is 1.52 Å. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one In(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one In(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one P(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one In(2) and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one In(1) and one P(3) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one P(3) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one P(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(3) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one In(1) and one C(1) atom. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one In(2) and one C(1) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one In(1) and one C(2) atom. In the sixteenth O site, O(16) is bonded in a bent 120 degrees geometry to one In(2) and one C(2) atom. Linkers: 2 [O]C(=O)C([O])=O. Metal clusters: 4 [In]. The MOF has largest included sphere 4.31 A, density 2.25 g/cm3, surface area 2334.77 m2/g, accessible volume 0.17 cm3/g