In3C30N9H18O13 is Magnesium structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is zero-dimensional and consists of two In3C30N9H18O13 clusters. In(1) is bonded to one N(1), one O(2), and four equivalent O(1) atoms to form corner-sharing InNO5 octahedra. The corner-sharing octahedral tilt angles are 60°. The In(1)-N(1) bond length is 2.14 Å. The In(1)-O(2) bond length is 2.02 Å. All In(1)-O(1) bond lengths are 2.16 Å. There are four inequivalent C sites. In the first C site, C(2) is bonded in a bent 120 degrees geometry to one C(3) and two equivalent O(1) atoms. The C(2)-C(3) bond length is 1.50 Å. Both C(2)-O(1) bond lengths are 1.25 Å. In the second C site, C(3) is bonded in a trigonal planar geometry to one C(2) and two equivalent C(1) atoms. Both C(3)-C(1) bond lengths are 1.37 Å. In the third C site, C(1) is bonded in a distorted single-bond geometry to one C(3) and one H(1) atom. The C(1)-H(1) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one N(1), one N(2), and one H(2) atom. The C(4)-N(1) bond length is 1.26 Å. The C(4)-N(2) bond length is 1.32 Å. The C(4)-H(2) bond length is 0.93 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) and two equivalent C(4) atoms. In the second N site, N(2) is bonded in a water-like geometry to one C(4) and one N(2) atom. The N(2)-N(2) bond length is 1.38 Å. There are two 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(4) atom. There are two inequivalent O sites. In the first O site, O(2) is bonded in a trigonal planar geometry to three equivalent In(1) atoms. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one In(1) and one C(2) atom. Linkers: 6 [O]C(=O)c1ccc(C([O])=O)cc1. Metal clusters: 6 [In]. RCSR code: ssa. The MOF has largest included sphere 8.07 A, density 1.16 g/cm3, surface area 3320.27 m2/g, accessible volume 0.47 cm3/g