In2C2P3H3O13 crystallizes in the orthorhombic Pna2_1 space group. There are two inequivalent In sites. In the first In site, In(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form InO6 octahedra that share  a cornercorner with one P(1)HO3 tetrahedra,  a cornercorner with one P(3)HO3 tetrahedra, and corners with two equivalent P(2)HO3 tetrahedra. The In(1)-O(1) bond length is 2.07 Å. The In(1)-O(2) bond length is 2.14 Å. The In(1)-O(3) bond length is 2.19 Å. The In(1)-O(4) bond length is 2.22 Å. The In(1)-O(5) bond length is 2.15 Å. The In(1)-O(6) bond length is 2.09 Å. In the second In site, In(2) is bonded to one O(10), one O(11), one O(12), one O(7), one O(8), and one O(9) atom to form InO6 octahedra that share  a cornercorner with one P(2)HO3 tetrahedra,  a cornercorner with one P(3)HO3 tetrahedra, and corners with two equivalent P(1)HO3 tetrahedra. The In(2)-O(10) bond length is 2.09 Å. The In(2)-O(11) bond length is 2.23 Å. The In(2)-O(12) bond length is 2.20 Å. The In(2)-O(7) bond length is 2.13 Å. The In(2)-O(8) bond length is 2.08 Å. The In(2)-O(9) 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(11) and one O(3) atom. The C(1)-O(11) bond length is 1.24 Å. The C(1)-O(3) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to one O(12) and one O(4) atom. The C(2)-O(12) bond length is 1.26 Å. The C(2)-O(4) bond length is 1.24 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one H(1), one O(1), one O(7), and one O(9) atom to form distorted PHO3 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 44-48°. The P(1)-H(1) bond length is 1.39 Å. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(7) bond length is 1.52 Å. The P(1)-O(9) bond length is 1.51 Å. In the second P site, P(2) is bonded to one H(2), one O(10), one O(2), and one O(5) atom to form distorted PHO3 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 44-48°. The P(2)-H(2) bond length is 1.29 Å. The P(2)-O(10) bond length is 1.52 Å. The P(2)-O(2) bond length is 1.53 Å. The P(2)-O(5) bond length is 1.51 Å. In the third P site, P(3) is bonded to one H(3), one O(13), one O(6), and one O(8) atom to form PHO3 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 45-52°. The P(3)-H(3) bond length is 1.30 Å. The P(3)-O(13) bond length is 1.52 Å. The P(3)-O(6) bond length is 1.52 Å. The P(3)-O(8) bond length is 1.53 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one P(3) atom. There are thirteen 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(1) 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 bent 120 degrees geometry to one In(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one In(1) and one C(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one In(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(3) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one In(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one In(2) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one In(2) and one P(1) atom. In the tenth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(2) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one In(2) and one C(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one In(2) and one C(2) atom. In the thirteenth O site, O(13) is bonded in a single-bond geometry to one P(3) atom. Linkers: 4 [O]C(=O)C([O])=O. Metal clusters: 8 [In]. The MOF has largest included sphere 4.89 A, density 2.11 g/cm3, surface area 2474.98 m2/g, accessible volume 0.22 cm3/g