ZnH8(CO3)2(CO)2 is Indium-derived structured and crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of eight formaldehyde molecules and four ZnH8(CO3)2 clusters. In each ZnH8(CO3)2 cluster, Zn(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Zn(1)-O(1) bond lengths are 2.09 Å. Both Zn(1)-O(2) bond lengths are 2.15 Å. Both Zn(1)-O(3) bond lengths are 2.10 Å. C(1) is bonded in a distorted single-bond geometry to one O(3) atom. The C(1)-O(3) bond length is 1.26 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. The H(2)-O(1) bond length is 0.99 Å. In the third H site, H(3) is bonded in a distorted single-bond geometry to one O(2) atom. The H(3)-O(2) bond length is 1.00 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(2) atom. The H(4)-O(2) bond length is 0.98 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one Zn(1), one H(1), and one H(2) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Zn(1), one H(3), and one H(4) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Zn(1) and one C(1) atom. Linkers: 2 O=C1C(=O)C(=O)C1=O. Metal clusters: 2 O.O.O.O.[O][Zn][O]. The MOF has largest included sphere 2.39 A, density 2.08 g/cm3, surface area 3519.77 m2/g, accessible volume 0.10 cm3/g