GdC8NH3O5 crystallizes in the triclinic P-1 space group. Gd(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(5), and three equivalent O(4) atoms. The Gd(1)-O(1) bond length is 2.38 Å. The Gd(1)-O(2) bond length is 2.37 Å. The Gd(1)-O(3) bond length is 2.39 Å. The Gd(1)-O(5) bond length is 2.39 Å. There are a spread of Gd(1)-O(4) bond distances ranging from 2.39-2.44 Å. There are eight inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-C(2) bond length is 1.52 Å. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(2) bond length is 1.25 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(7) atom. The C(2)-C(3) bond length is 1.38 Å. The C(2)-C(7) bond length is 1.40 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(1) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(1) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(3), one C(5), and one N(1) atom. The C(4)-C(5) bond length is 1.39 Å. The C(4)-N(1) bond length is 1.43 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(4), one C(6), and one H(2) atom. The C(5)-C(6) bond length is 1.39 Å. The C(5)-H(2) bond length is 0.93 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(8) atom. The C(6)-C(7) bond length is 1.38 Å. The C(6)-C(8) bond length is 1.51 Å. In the seventh C site, C(7) is bonded in a single-bond geometry to one C(2), one C(6), and one H(3) atom. The C(7)-H(3) bond length is 0.93 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(3), and one O(5) atom. The C(8)-O(3) bond length is 1.25 Å. The C(8)-O(5) bond length is 1.26 Å. N(1) is bonded in a distorted bent 120 degrees geometry to one C(4) and one N(1) atom. The N(1)-N(1) bond length is 1.25 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Gd(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(8) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to three equivalent Gd(1) atoms. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Gd(1) and one C(8) atom. Linkers: 1 [O]C(=O)c1cc(/N=N/c2cc(C([O])=O)cc(C([O])=O)c2)cc(C([O])=O)c1. Metal clusters: 2 [Gd]. RCSR code: kgd. The MOF has largest included sphere 3.87 A, density 2.42 g/cm3, surface area 2183.33 m2/g, accessible volume 0.11 cm3/g