TlTlH4(C3O2)3H2O is Indium-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four 7440-28-0 atoms, four water molecules, and four TlH4(C3O2)3 clusters. In each TlH4(C3O2)3 cluster, Tl(1) is bonded in a 1-coordinate geometry to one O(4) atom. The Tl(1)-O(4) bond length is 2.75 Å. There are nine 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 1.47 Å. The C(1)-O(1) bond length is 1.23 Å. The C(1)-O(2) bond length is 1.36 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 1.40 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(4) atom. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(4) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(8) atom. The C(4)-C(5) bond length is 1.40 Å. The C(4)-C(8) bond length is 1.50 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(5) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-H(5) bond length is 1.09 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(9) atom. The C(6)-C(7) bond length is 1.40 Å. The C(6)-C(9) bond length is 1.51 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(2), one C(6), and one H(6) atom. The C(7)-H(6) bond length is 1.09 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.26 Å. The C(8)-O(4) bond length is 1.29 Å. In the ninth C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(6), one O(5), and one O(6) atom. The C(9)-O(5) bond length is 1.27 Å. The C(9)-O(6) bond length is 1.28 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(2) atom. The H(1)-O(2) bond length is 0.98 Å. In the second H site, H(4) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(5) is bonded in a single-bond geometry to one C(5) atom. In the fourth H site, H(6) is bonded in a single-bond geometry to one C(7) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one C(1) atom. In the second O site, O(2) is bonded in a water-like geometry to one C(1) and one H(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one C(8) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Tl(1) and one C(8) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one C(9) atom. In the sixth O site, O(6) is bonded in a single-bond geometry to one C(9) atom. Linkers: 4 [O]C(=O)c1cc(C([O])=O)cc(C(=O)O)c1. Metal clusters: 8 [Tl]. The MOF has largest included sphere 1.69 A, density 3.58 g/cm3, surface area 1927.66 m2/g, accessible volume 0.03 cm3/g