TlC7NH6O3 is Indium-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of two TlC7NH6O3 clusters. Tl(1) is bonded in a 2-coordinate geometry to two equivalent O(2) atoms. There is one shorter (2.76 Å) and one longer (2.81 Å) Tl(1)-O(2) bond length. There are seven inequivalent C sites. In the first C site, C(2) is bonded in a distorted single-bond geometry to one C(3) and one O(1) atom. The C(2)-C(3) bond length is 1.42 Å. The C(2)-O(1) bond length is 1.36 Å. In the second C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(6) atom. The C(3)-C(4) bond length is 1.48 Å. The C(3)-C(6) bond length is 1.41 Å. In the third C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(2), and one O(3) atom. The C(4)-O(2) bond length is 1.27 Å. The C(4)-O(3) bond length is 1.30 Å. In the fourth C site, C(5) is bonded in a distorted trigonal planar geometry to one C(1), one C(7), and one N(1) atom. The C(5)-C(1) bond length is 1.41 Å. The C(5)-C(7) bond length is 1.42 Å. The C(5)-N(1) bond length is 1.36 Å. In the fifth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(3), one C(7), and one H(5) atom. The C(6)-C(7) bond length is 1.38 Å. The C(6)-H(5) bond length is 1.09 Å. In the sixth C site, C(7) is bonded in a distorted single-bond geometry to one C(5), one C(6), and one H(6) atom. The C(7)-H(6) bond length is 1.09 Å. In the seventh C site, C(1) is bonded in a distorted single-bond geometry to one C(5) and one H(2) atom. The C(1)-H(2) bond length is 1.09 Å. N(1) is bonded in a trigonal planar geometry to one C(5), one H(3), and one H(4) atom. The N(1)-H(3) bond length is 1.01 Å. The N(1)-H(4) bond length is 1.02 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a bent 150 degrees geometry to one O(1) and one O(3) atom. The H(1)-O(1) bond length is 1.04 Å. The H(1)-O(3) bond length is 1.53 Å. In the second H site, H(2) is bonded in a single-bond geometry to one C(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one N(1) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one N(1) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(6) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one C(7) atom. There are three inequivalent O sites. In the first O site, O(2) is bonded in a single-bond geometry to two equivalent Tl(1) and one C(4) atom. In the second O site, O(3) is bonded in a water-like geometry to one C(4) and one H(1) atom. In the third O site, O(1) is bonded in a water-like geometry to one C(2) and one H(1) atom. Linkers: 4 Nc1ccc(C([O])=O)c(O)c1. Metal clusters: 2 [OH].[OH].[O][C]=O.[O][C]=O.[Tl].[Tl]. The MOF has largest included sphere 2.04 A, density 2.98 g/cm3, surface area 2483.03 m2/g, accessible volume 0.06 cm3/g