InC8H2(NO)4(CO2)2 crystallizes in the cubic Fd-3c space group. The structure consists of one hundred and ninety-two formic acid molecules inside a InC8H2(NO)4 framework. In the InC8H2(NO)4 framework, In(1) is bonded in a pentagonal pyramidal geometry to two equivalent N(1), two equivalent N(2), and two equivalent O(3) atoms. Both In(1)-N(1) bond lengths are 2.20 Å. Both In(1)-N(2) bond lengths are 2.17 Å. Both In(1)-O(3) bond lengths are 2.29 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one N(1) atom. The C(1)-N(1) bond length is 1.37 Å. In the second C site, C(4) is bonded in a distorted single-bond geometry to one N(2) atom. The C(4)-N(2) bond length is 1.34 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(1) atom. The C(3)-N(1) bond length is 1.34 Å. The C(3)-N(2) bond length is 1.32 Å. The C(3)-H(1) bond length is 0.93 Å. In the fourth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(5)-O(3) bond length is 1.24 Å. The C(5)-O(4) bond length is 1.22 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one In(1), one C(1), and one C(3) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one In(1), one C(3), and one C(4) atom. H(1) is bonded in a single-bond geometry to one C(3) atom. There are two inequivalent O sites. In the first O site, O(3) is bonded in a bent 120 degrees geometry to one In(1) and one C(5) atom. In the second O site, O(4) is bonded in a single-bond geometry to one C(5) atom. Linkers: 41 [O]C(=O)[C]1N=CN=C1C([O])=O ,3 [O]C(=O)C1=C(C([O])=O)N=C[N]1. Metal clusters: 24 [In]. The MOF has largest included sphere 8.09 A, density 1.43 g/cm3, surface area 3097.04 m2/g, accessible volume 0.36 cm3/g