AgH8(C4N3)2 crystallizes in the trigonal R-3c space group. Ag(1) is bonded in a linear geometry to two equivalent N(3) atoms. Both Ag(1)-N(3) bond lengths are 2.14 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2) and two equivalent C(1) atoms. The C(1)-C(2) bond length is 1.51 Å. Both C(1)-C(1) bond lengths are 1.40 Å. In the second C site, C(2) is bonded in a 3-coordinate geometry to one C(1); one N(1); and two equivalent H(1,2) atoms. The C(2)-N(1) bond length is 1.47 Å. Both C(2)-H(1,2) bond lengths are 0.97 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one N(2), one N(3), and one H(3) atom. The C(3)-N(2) bond length is 1.31 Å. The C(3)-N(3) bond length is 1.35 Å. The C(3)-H(3) 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(3), and one H(4) atom. The C(4)-N(1) bond length is 1.30 Å. The C(4)-N(3) bond length is 1.31 Å. The C(4)-H(4) bond length is 0.93 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a 2-coordinate geometry to one C(2), one C(4), and one N(2) atom. The N(1)-N(2) bond length is 1.36 Å. In the second N site, N(2) is bonded in a distorted water-like geometry to one C(3) and one N(1) atom. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Ag(1), one C(3), and one C(4) atom. There are three inequivalent H sites. In the first H site, H(1,2) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(3) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(4) is bonded in a single-bond geometry to one C(4) atom. Linkers: 5 c1ncn(Cc2c(Cn3cncn3)c(Cn3cncn3)c(Cn3cncn3)c(Cn3cncn3)c2Cn2cncn2)n1 ,2 [CH]1N=C[N]N1Cc1c(Cn2cncn2)c(Cn2cncn2)c(Cn2cncn2)c(Cn2cncn2)c1Cn1cncn1 ,1 [CH]1N=C[N]N1Cc1c(Cn2cncn2)c(CN2[CH]N=C[N]2)c(Cn2cncn2)c(Cn2cncn2)c1Cn1cncn1. Metal clusters: 18 [Ag]. The MOF has largest included sphere 4.90 A, density 1.40 g/cm3, surface area 3777.12 m2/g, accessible volume 0.34 cm3/g