Ag2C7N6H2O5 crystallizes in the monoclinic C2/c space group. Ag(1) is bonded in a 5-coordinate geometry to one N(2), one N(3), one O(1), and two equivalent O(3) atoms. The Ag(1)-N(2) bond length is 2.20 Å. The Ag(1)-N(3) bond length is 2.31 Å. The Ag(1)-O(1) bond length is 2.36 Å. There is one shorter (2.46 Å) and one longer (2.80 Å) Ag(1)-O(3) bond length. There are five inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(5) and two equivalent C(2) atoms. The C(1)-C(5) bond length is 1.46 Å. Both C(1)-C(2) bond lengths are 1.40 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.39 Å. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one N(1) atom. The C(3)-C(4) bond length is 1.46 Å. The C(3)-N(1) bond length is 1.44 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to two equivalent C(3) and one O(1) atom. The C(4)-O(1) bond length is 1.27 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(1) and two equivalent N(2) atoms. Both C(5)-N(2) bond lengths are 1.35 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one C(3), one O(2), and one O(3) atom. The N(1)-O(2) bond length is 1.25 Å. The N(1)-O(3) bond length is 1.26 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Ag(1), one C(5), and one N(3) atom. The N(2)-N(3) bond length is 1.34 Å. In the third N site, N(3) is bonded in a trigonal planar geometry to one Ag(1), one N(2), and one N(3) atom. The N(3)-N(3) bond length is 1.31 Å. H(1) is bonded in a single-bond geometry to one C(2) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ag(1) and one C(4) atom. In the second O site, O(2) is bonded in a single-bond geometry to one N(1) atom. In the third O site, O(3) is bonded in a 1-coordinate geometry to two equivalent Ag(1) and one N(1) atom. Linkers: 2 O=C1C([N+](=O)[O-])=C[C](C2=NN=N[N]2)C=C1[N+](=O)[O-]. Metal clusters: 4 [Ag]. The MOF has largest included sphere 1.73 A, density 2.97 g/cm3, surface area 2375.47 m2/g, accessible volume 0.07 cm3/g