InCPO6 crystallizes in the orthorhombic Pccm space group. There are two inequivalent In sites. In the first In site, In(1) is bonded to one O(5), one O(6), one O(7), and two equivalent O(1) atoms to form InO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. The In(1)-O(5) bond length is 2.17 Å. The In(1)-O(6) bond length is 2.25 Å. The In(1)-O(7) bond length is 2.07 Å. Both In(1)-O(1) bond lengths are 2.12 Å. In the second In site, In(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form InO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. Both In(2)-O(2) bond lengths are 2.09 Å. Both In(2)-O(3) bond lengths are 2.23 Å. Both In(2)-O(4) bond lengths are 2.08 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(5) and one O(6) atom. The C(1)-O(5) bond length is 1.24 Å. The C(1)-O(6) bond length is 1.25 Å. In the second C site, C(2) is bonded in a distorted bent 120 degrees geometry to two equivalent O(3) atoms. Both C(2)-O(3) bond lengths are 1.23 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(7), one O(8), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with two equivalent In(2)O6 octahedra and  a cornercorner with one In(1)O5 square pyramid. The corner-sharing octahedral tilt angles are 31°. The P(1)-O(7) bond length is 1.49 Å. The P(1)-O(8) bond length is 1.48 Å. Both P(1)-O(4) bond lengths are 1.51 Å. In the second P site, P(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with two equivalent In(2)O6 octahedra and corners with two equivalent In(1)O5 square pyramids. The corner-sharing octahedral tilt angles are 38°. Both P(2)-O(1) bond lengths are 1.52 Å. Both P(2)-O(2) bond lengths are 1.50 Å. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a bent 120 degrees geometry to one In(1) and one C(1) atom. In the second O site, O(7) is bonded in a distorted bent 120 degrees geometry to one In(1) and one P(1) atom. In the third O site, O(8) is bonded in a single-bond geometry to one P(1) atom. In the fourth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one In(1) and one P(2) atom. In the fifth O site, O(2) is bonded in a bent 150 degrees geometry to one In(2) and one P(2) atom. In the sixth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one In(2) and one C(2) atom. In the seventh O site, O(4) is bonded in a bent 150 degrees geometry to one In(2) and one P(1) atom. In the eighth O site, O(6) is bonded in a bent 120 degrees geometry to one In(1) and one C(1) atom. Linkers: 4 [O]C(=O)C([O])=O. Metal clusters: 8 [In]. The MOF has largest included sphere 6.67 A, density 2.06 g/cm3, surface area 2211.32 m2/g, accessible volume 0.25 cm3/g