Ag5C8N5H2O9 crystallizes in the triclinic P-1 space group. There are five inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 4-coordinate geometry to one C(8), one N(3), one O(7), and one O(9) atom. The Ag(1)-C(8) bond length is 2.26 Å. The Ag(1)-N(3) bond length is 2.24 Å. The Ag(1)-O(7) bond length is 2.74 Å. The Ag(1)-O(9) bond length is 2.59 Å. In the second Ag site, Ag(2) is bonded in a distorted bent 150 degrees geometry to one C(6) and two equivalent C(8) atoms. The Ag(2)-C(6) bond length is 2.13 Å. There is one shorter (2.10 Å) and one longer (2.79 Å) Ag(2)-C(8) bond length. In the third Ag site, Ag(3) is bonded in a distorted T-shaped geometry to one C(6), one N(2), and one O(1) atom. The Ag(3)-C(6) bond length is 2.11 Å. The Ag(3)-N(2) bond length is 2.21 Å. The Ag(3)-O(1) bond length is 2.61 Å. In the fourth Ag site, Ag(4) is bonded in a 5-coordinate geometry to one C(5), one C(6), one O(2), one O(5), and one O(8) atom. The Ag(4)-C(5) bond length is 2.22 Å. The Ag(4)-C(6) bond length is 2.35 Å. The Ag(4)-O(2) bond length is 2.55 Å. The Ag(4)-O(5) bond length is 2.48 Å. The Ag(4)-O(8) bond length is 2.30 Å. In the fifth Ag site, Ag(5) is bonded in a 5-coordinate geometry to one C(8), one O(4), one O(8), and two equivalent O(3) atoms. The Ag(5)-C(8) bond length is 2.28 Å. The Ag(5)-O(4) bond length is 2.48 Å. The Ag(5)-O(8) bond length is 2.56 Å. There is one shorter (2.39 Å) and one longer (2.72 Å) Ag(5)-O(3) bond length. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(2), one C(5), and one N(2) atom. The C(1)-C(2) bond length is 1.41 Å. The C(1)-C(5) bond length is 1.42 Å. The C(1)-N(2) bond length is 1.36 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1) and one H(1) atom. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(4) and one H(2) atom. The C(3)-C(4) bond length is 1.41 Å. The C(3)-H(2) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(7), and one N(3) atom. The C(4)-C(7) bond length is 1.41 Å. The C(4)-N(3) bond length is 1.36 Å. In the fifth C site, C(5) is bonded in a distorted trigonal planar geometry to one Ag(4), one C(1), and one C(6) atom. The C(5)-C(6) bond length is 1.26 Å. In the sixth C site, C(6) is bonded in a 4-coordinate geometry to one Ag(2), one Ag(3), one Ag(4), and one C(5) atom. In the seventh C site, C(7) is bonded in a distorted linear geometry to one C(4) and one C(8) atom. The C(7)-C(8) bond length is 1.25 Å. In the eighth C site, C(8) is bonded in a 5-coordinate geometry to one Ag(1), one Ag(5), two equivalent Ag(2), and one C(7) atom. There are five inequivalent N sites. In the first N site, N(1) is bonded in a trigonal planar geometry to one O(2), one O(3), and one O(9) atom. The N(1)-O(2) bond length is 1.26 Å. The N(1)-O(3) bond length is 1.28 Å. The N(1)-O(9) bond length is 1.26 Å. In the second N site, N(2) is bonded in a distorted trigonal planar geometry to one Ag(3), one C(1), and one N(3) atom. The N(2)-N(3) bond length is 1.33 Å. In the third N site, N(3) is bonded in a distorted trigonal planar geometry to one Ag(1), one C(4), and one N(2) atom. In the fourth N site, N(4) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. The N(4)-O(4) bond length is 1.27 Å. The N(4)-O(5) bond length is 1.27 Å. The N(4)-O(6) bond length is 1.27 Å. In the fifth N site, N(5) is bonded in a trigonal planar geometry to one O(1), one O(7), and one O(8) atom. The N(5)-O(1) bond length is 1.27 Å. The N(5)-O(7) bond length is 1.25 Å. The N(5)-O(8) bond length is 1.29 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ag(3) and one N(5) atom. In the second O site, O(2) is bonded in a distorted water-like geometry to one Ag(4) and one N(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Ag(5) and one N(1) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one Ag(5) and one N(4) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Ag(4) and one N(4) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one N(4) atom. In the seventh O site, O(7) is bonded in a single-bond geometry to one Ag(1) and one N(5) atom. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Ag(4), one Ag(5), and one N(5) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Ag(1) and one N(1) atom. Linkers: 2 [C]#Cc1ccc(C#[C])nn1. Metal clusters: 10 [Ag]. The MOF has largest included sphere 1.55 A, density 3.93 g/cm3, surface area 1439.06 m2/g, accessible volume 0.03 cm3/g