HgC5NH3O3(CH3)2 is Indium-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of eight 02329_fluka molecules and four HgC5NH3O3 clusters. In each HgC5NH3O3 cluster, Hg(1) is bonded in a linear geometry to one C(1) and one O(2) atom. The Hg(1)-C(1) bond length is 2.05 Å. The Hg(1)-O(2) bond length is 2.14 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one Hg(1), one C(2), and one C(3) atom. The C(1)-C(2) bond length is 1.37 Å. The C(1)-C(3) bond length is 1.43 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one O(1) atom. The C(2)-O(1) bond length is 1.36 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(1), one C(5), and one N(1) atom. The C(3)-C(5) bond length is 1.49 Å. The C(3)-N(1) bond length is 1.33 Å. In the fourth C site, C(5) is bonded in a distorted trigonal non-coplanar geometry to one C(3), one H(4), one H(5), and one H(6) atom. The C(5)-H(4) bond length is 1.10 Å. The C(5)-H(5) bond length is 1.09 Å. The C(5)-H(6) bond length is 1.10 Å. In the fifth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(3) atom. The C(6)-O(2) bond length is 1.32 Å. The C(6)-O(3) bond length is 1.25 Å. N(1) is bonded in a water-like geometry to one C(3) and one O(1) atom. The N(1)-O(1) bond length is 1.42 Å. There are three inequivalent H sites. In the first H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the second H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(6) is bonded in a single-bond geometry to one C(5) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one C(2) and one N(1) atom. In the second O site, O(2) is bonded in a water-like geometry to one Hg(1) and one C(6) atom. In the third O site, O(3) is bonded in a single-bond geometry to one C(6) atom. Linkers: 4 CC([O])=O. Metal clusters: 4 [Hg]. The MOF has largest included sphere 1.99 A, density 2.60 g/cm3, surface area 3125.04 m2/g, accessible volume 0.12 cm3/g