GdC7H7SO7 crystallizes in the tetragonal P-42_1c space group. Gd(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(7), and three equivalent O(6) atoms. The Gd(1)-O(1) bond length is 2.35 Å. The Gd(1)-O(2) bond length is 2.39 Å. The Gd(1)-O(4) bond length is 2.38 Å. The Gd(1)-O(5) bond length is 2.32 Å. The Gd(1)-O(7) bond length is 2.54 Å. There are a spread of Gd(1)-O(6) bond distances ranging from 2.37-2.43 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(7), and one S(1) atom. The C(1)-C(2) bond length is 1.39 Å. The C(1)-C(7) bond length is 1.40 Å. The C(1)-S(1) bond length is 1.77 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(1) atom. The C(2)-C(3) bond length is 1.40 Å. The C(2)-H(1) bond length is 1.09 Å. In the third C site, C(3) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(5) atom. The C(3)-C(4) bond length is 1.49 Å. The C(3)-C(5) bond length is 1.40 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(4), and one O(5) atom. The C(4)-O(4) bond length is 1.28 Å. The C(4)-O(5) bond length is 1.27 Å. In the fifth C site, C(5) is bonded in a distorted single-bond geometry to one C(3), one C(6), and one H(2) atom. The C(5)-C(6) bond length is 1.40 Å. The C(5)-H(2) bond length is 1.09 Å. In the sixth C site, C(6) is bonded in a distorted trigonal planar geometry to one C(5), one C(7), and one H(3) atom. The C(6)-C(7) bond length is 1.40 Å. The C(6)-H(3) bond length is 1.09 Å. In the seventh C site, C(7) is bonded in a distorted single-bond geometry to one C(1), one C(6), and one H(4) atom. The C(7)-H(4) bond length is 1.09 Å. There are seven 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(5) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(6) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(7) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(6) atom. The H(5)-O(6) bond length is 0.97 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(7) atom. The H(6)-O(7) bond length is 0.98 Å. In the seventh H site, H(7) is bonded in a single-bond geometry to one O(7) atom. The H(7)-O(7) bond length is 0.99 Å. S(1) is bonded in a distorted trigonal non-coplanar geometry to one C(1), one O(1), one O(2), and one O(3) atom. The S(1)-O(1) bond length is 1.47 Å. The S(1)-O(2) bond length is 1.48 Å. The S(1)-O(3) bond length is 1.47 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Gd(1) and one S(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Gd(1) and one S(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one S(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(4) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to three equivalent Gd(1) and one H(5) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one Gd(1), one H(6), and one H(7) atom. Linkers: 8 [O]C(=O)c1cccc(S([O])([O])[O])c1. Metal clusters: 8 [Gd]. The MOF has largest included sphere 4.06 A, density 2.08 g/cm3, surface area 2567.93 m2/g, accessible volume 0.18 cm3/g