InPH7(C2O)7 crystallizes in the tetragonal P4/mnc space group. In(1) is bonded to one O(2), one O(3), one O(4), one O(6), and two equivalent O(1) atoms to form distorted InO6 octahedra that share corners with three equivalent P(1)CO3 tetrahedra. The In(1)-O(2) bond length is 2.07 Å. The In(1)-O(3) bond length is 2.30 Å. The In(1)-O(4) bond length is 2.25 Å. The In(1)-O(6) bond length is 2.12 Å. Both In(1)-O(1) bond lengths are 2.14 Å. There are fourteen inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(1)-C(2) bond length is 1.36 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(12), and one P(1) atom. The C(2)-C(12) bond length is 1.34 Å. The C(2)-P(1) bond length is 1.82 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(9), one O(3), and one O(4) atom. The C(3)-C(9) bond length is 1.50 Å. The C(3)-O(3) bond length is 1.26 Å. The C(3)-O(4) bond length is 1.26 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(10), one C(14), and one C(7) atom. The C(4)-C(10) bond length is 1.37 Å. The C(4)-C(14) bond length is 1.36 Å. The C(4)-C(7) bond length is 1.49 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(7), one C(9), and one H(2) atom. The C(5)-C(7) bond length is 1.38 Å. The C(5)-C(9) bond length is 1.37 Å. The C(5)-H(2) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(11), one C(13), and one C(8) atom. The C(6)-C(11) bond length is 1.49 Å. The C(6)-C(13) bond length is 1.39 Å. The C(6)-C(8) bond length is 1.37 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(13), one C(4), and one C(5) atom. The C(7)-C(13) bond length is 1.40 Å. In the eighth C site, C(8) is bonded in a distorted single-bond geometry to one C(6), one C(9), and one H(3) atom. The C(8)-C(9) bond length is 1.40 Å. The C(8)-H(3) bond length is 0.93 Å. In the ninth C site, C(9) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(8) atom. In the tenth C site, C(10) is bonded in a distorted single-bond geometry to one C(4) and one H(4,7) atom. The C(10)-H(4,7) bond length is 0.93 Å. In the eleventh C site, C(11) is bonded in a bent 120 degrees geometry to one C(6), one O(5), and one O(6) atom. The C(11)-O(5) bond length is 1.25 Å. The C(11)-O(6) bond length is 1.26 Å. In the twelfth C site, C(12) is bonded in a distorted single-bond geometry to one C(2) and one H(5) atom. The C(12)-H(5) bond length is 0.93 Å. In the thirteenth C site, C(13) is bonded in a distorted single-bond geometry to one C(6), one C(7), and one H(6) atom. The C(13)-H(6) bond length is 0.93 Å. In the fourteenth C site, C(14) is bonded in a distorted single-bond geometry to one C(4) and one H(4,7) atom. The C(14)-H(4,7) bond length is 0.93 Å. P(1) is bonded to one C(2), one O(2), and two equivalent O(1) atoms to form PCO3 tetrahedra that share corners with three equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles are 43°. The P(1)-O(2) bond length is 1.53 Å. Both P(1)-O(1) bond lengths are 1.53 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(8) atom. In the fourth H site, H(4,7) is bonded in a single-bond geometry to one C(10) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(12) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(13) atom. There are six inequivalent O sites. In the first O site, O(6) is bonded in a water-like geometry to one In(1) and one C(11) atom. In the second O site, O(1) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(1) atom. In the third O site, O(2) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(1) atom. In the fourth O site, O(3) is bonded in a distorted L-shaped geometry to one In(1) and one C(3) atom. In the fifth O site, O(4) is bonded in an L-shaped geometry to one In(1) and one C(3) atom. In the sixth O site, O(5) is bonded in a single-bond geometry to one C(11) atom. Linkers: 8 [O]C(=O)c1cc(C([O])=O)cc(-c2ccc(P([O])([O])=O)cc2)c1. Metal clusters: 8 [In]. The MOF has largest included sphere 9.14 A, density 1.56 g/cm3, surface area 3152.83 m2/g, accessible volume 0.26 cm3/g