ZnC5N3H4(C4NH2)2 is Indium-derived structured and crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of twenty-four C4NH2 clusters and nine ZnC5N3H4 clusters. In six of the C4NH2 clusters, there are three inequivalent C sites. In the first C site, C(2,4,6,8,10,12,14,16) is bonded in a distorted single-bond geometry to one C(17,19,21,23) and one H(2,4,6,8,10,12,14,16) atom. The C(2,4,6,8,10,12,14,16)-C(17,19,21,23) bond length is 1.38 Å. The C(2,4,6,8,10,12,14,16)-H(2,4,6,8,10,12,14,16) bond length is 1.08 Å. In the second C site, C(17,19,21,23) is bonded in a trigonal planar geometry to one C(18,20,22,24) and two equivalent C(2,4,6,8,10,12,14,16) atoms. The C(17,19,21,23)-C(18,20,22,24) bond length is 1.47 Å. In the third C site, C(18,20,22,24) is bonded in a trigonal planar geometry to one C(17,19,21,23) and two equivalent N(7,8,9,10) atoms. Both C(18,20,22,24)-N(7,8,9,10) bond lengths are 1.33 Å. N(7,8,9,10) is bonded in a bent 120 degrees geometry to two equivalent C(18,20,22,24) atoms. H(2,4,6,8,10,12,14,16) is bonded in a single-bond geometry to one C(2,4,6,8,10,12,14,16) atom. In eighteen of the C4NH2 clusters, there are three inequivalent C sites. In the first C site, C(2,4,6,8,10,12,14,16) is bonded in a distorted single-bond geometry to one C(17,19,21,23) and one H(2,4,6,8,10,12,14,16) atom. In the second C site, C(17,19,21,23) is bonded in a trigonal planar geometry to one C(18,20,22,24) and two equivalent C(2,4,6,8,10,12,14,16) atoms. In the third C site, C(18,20,22,24) is bonded in a trigonal planar geometry to one C(17,19,21,23) and two equivalent N(7,8,9,10) atoms. N(7,8,9,10) is bonded in a bent 120 degrees geometry to two equivalent C(18,20,22,24) atoms. H(2,4,6,8,10,12,14,16) is bonded in a single-bond geometry to one C(2,4,6,8,10,12,14,16) atom. In each ZnC5N3H4 cluster, Zn(1,2) is bonded in a see-saw-like geometry to one C(25,26); one N(5,6); and two equivalent N(1,2,3,4) atoms. The Zn(1,2)-C(25,26) bond length is 2.05 Å. The Zn(1,2)-N(5,6) bond length is 2.05 Å. Both Zn(1,2)-N(1,2,3,4) bond lengths are 2.15 Å. There are two inequivalent C sites. In the first C site, C(1,3,5,7,9,11,13,15) is bonded in a distorted bent 120 degrees geometry to one N(1,2,3,4) and one H(1,3,5,7,9,11,13,15) atom. The C(1,3,5,7,9,11,13,15)-N(1,2,3,4) bond length is 1.32 Å. The C(1,3,5,7,9,11,13,15)-H(1,3,5,7,9,11,13,15) bond length is 1.08 Å. In the second C site, C(25,26) is bonded in a linear geometry to one Zn(1,2) and one N(5,6) atom. The C(25,26)-N(5,6) bond length is 1.16 Å. There are two inequivalent N sites. In the first N site, N(5,6) is bonded in a linear geometry to one Zn(1,2) and one C(25,26) atom. In the second N site, N(1,2,3,4) is bonded in a trigonal planar geometry to one Zn(1,2) and two equivalent C(1,3,5,7,9,11,13,15) atoms. H(1,3,5,7,9,11,13,15) is bonded in a single-bond geometry to one C(1,3,5,7,9,11,13,15) atom. Linkers: 10 n1ccc(cc1)C1=NC(=[N]=C([N]1)c1ccncc1)c1ccncc1. Metal clusters: 12 [Zn]. The MOF has largest included sphere 13.54 A, density 0.93 g/cm3, surface area 4713.92 m2/g, accessible volume 0.63 cm3/g