FeAg2H4(C4N3)2(C4NH2)2 crystallizes in the trigonal R-3m space group. The structure consists of six C4NH2 clusters inside a FeAg2H4(C4N3)2 framework. In each C4NH2 cluster, there are three inequivalent C sites. In the first C site, C(2) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. The C(2)-C(4) bond length is 1.40 Å. The C(2)-H(2) bond length is 0.93 Å. In the second C site, C(4) is bonded in a trigonal planar geometry to one C(5) and two equivalent C(2) atoms. The C(4)-C(5) bond length is 1.48 Å. In the third C site, C(5) is bonded in a distorted trigonal planar geometry to one C(4) and two equivalent N(3) atoms. Both C(5)-N(3) bond lengths are 1.35 Å. N(3) is bonded in a bent 120 degrees geometry to two equivalent C(5) atoms. H(2) is bonded in a single-bond geometry to one C(2) atom. In the FeAg2H4(C4N3)2 framework, Fe(1) is bonded in an octahedral geometry to two equivalent N(2) and four equivalent N(1) atoms. Both Fe(1)-N(2) bond lengths are 1.99 Å. All Fe(1)-N(1) bond lengths are 1.94 Å. Ag(1) is bonded in a linear geometry to two equivalent C(3) atoms. Both Ag(1)-C(3) bond lengths are 2.07 Å. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one N(2) and one H(1) atom. The C(1)-N(2) bond length is 1.35 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(3) is bonded in a linear geometry to one Ag(1) and one N(1) atom. The C(3)-N(1) bond length is 1.17 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded in a linear geometry to one Fe(1) and one C(3) atom. In the second N site, N(2) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent C(1) atoms. H(1) is bonded in a single-bond geometry to one C(1) atom. Linkers: 3 [C]#[N][Fe](N1[CH]C=C(C=C1)C1=NC(=[N]=C([N]1)c1ccncc1)c1ccncc1)(N1[CH]C=C(C=C1)C1=NC(=[N]=C([N]1)c1ccncc1)c1ccncc1)([N]#[C])([N]#[C])[N]#[C]. Metal clusters: 6 [Fe]. The MOF has largest included sphere 4.63 A, density 1.53 g/cm3, surface area 3204.67 m2/g, accessible volume 0.32 cm3/g