InH2(C5O4)2 crystallizes in the hexagonal P6_222 space group. In(1) is bonded in a distorted hexagonal bipyramidal geometry to four equivalent O(1) and four equivalent O(2) atoms. All In(1)-O(1) bond lengths are 2.18 Å. All In(1)-O(2) bond lengths are 2.36 Å. There are three inequivalent C sites. In the first C site, C(3) is bonded in a single-bond geometry to two equivalent C(2) and one H(1) atom. Both C(3)-C(2) bond lengths are 1.36 Å. The C(3)-H(1) bond length is 0.95 Å. In the second C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.45 Å. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(2) bond length is 1.26 Å. In the third C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(2), and one C(3) atom. The C(2)-C(2) bond length is 1.45 Å. 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(1) is bonded in a distorted water-like geometry to one In(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted L-shaped geometry to one In(1) and one C(1) atom. Linkers: 3 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)cc1C([O])=O. Metal clusters: 3 O=[C]O[In](O[C]=O)O[C]=O.[O][C]=O. RCSR code: pth. The MOF has largest included sphere 4.43 A, density 1.35 g/cm3, surface area 3077.83 m2/g, accessible volume 0.34 cm3/g