ZnH8(C3N)4 crystallizes in the cubic Fd-3c space group. The structure consists of a ZnH8(C3N)4 framework. Zn(1) is bonded in a linear geometry to two equivalent N(1) atoms. Both Zn(1)-N(1) bond lengths are 2.07 Å. There are six inequivalent C sites. In the first C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one H(2) atom. The C(2)-C(1) bond length is 1.37 Å. The C(2)-C(3) bond length is 1.38 Å. The C(2)-H(2) bond length is 0.95 Å. In the second C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(6) atom. The C(3)-C(4) bond length is 1.39 Å. The C(3)-C(6) bond length is 1.48 Å. In the third C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one N(1), and one H(1) atom. The C(1)-N(1) bond length is 1.34 Å. The C(1)-H(1) bond length is 0.95 Å. In the fourth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(3) and two equivalent N(2) atoms. Both C(6)-N(2) bond lengths are 1.33 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one N(1) and one H(4) atom. The C(5)-N(1) bond length is 1.33 Å. The C(5)-H(4) bond length is 0.95 Å. In the sixth C site, C(4) is bonded in a single-bond geometry to one C(3) and one H(3) atom. The C(4)-H(3) bond length is 0.95 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one Zn(1), one C(1), and one C(5) atom. In the second N site, N(2) is bonded in a bent 120 degrees geometry to two equivalent C(6) atoms. There are four inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(2) is bonded in a single-bond geometry to one C(2) atom. Linkers: 64 n1ccc(cc1)C1=NC(=[N]=C([N]1)c1ccncc1)c1ccncc1. Metal clusters: 96 [Zn]. The MOF has largest included sphere 11.94 A, density 0.56 g/cm3, surface area 4679.75 m2/g, accessible volume 1.41 cm3/g