InCPO6 crystallizes in the triclinic P-1 space group. 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 corners with four equivalent P(1)O4 tetrahedra. The In(1)-O(1) bond length is 2.10 Å. The In(1)-O(2) bond length is 2.12 Å. The In(1)-O(3) bond length is 2.10 Å. The In(1)-O(4) bond length is 2.14 Å. The In(1)-O(5) bond length is 2.29 Å. The In(1)-O(6) bond length is 2.23 Å. C(1) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(1)-O(5) bond length is 1.26 Å. The C(1)-O(6) bond length is 1.28 Å. 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 corners with four equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 35-46°. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.52 Å. The P(1)-O(4) bond length is 1.56 Å. There are six 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 bent 150 degrees geometry to one In(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one In(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one In(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one In(1) and one C(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one In(1) and one C(1) atom. Linkers: 1 [O]C(=O)C([O])=O. Metal clusters: 2 [In]. The MOF has largest included sphere 4.25 A, density 2.63 g/cm3, surface area 2078.48 m2/g, accessible volume 0.14 cm3/g