BaC10H10(SO4)2 crystallizes in the monoclinic C2/c space group. Ba(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Ba(1)-O(1) bond lengths are 2.70 Å. Both Ba(1)-O(2) bond lengths are 2.87 Å. Both Ba(1)-O(3) bond lengths are 2.81 Å. Both Ba(1)-O(4) bond lengths are 2.76 Å. There are five inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(2), one C(5), and one S(1) atom. The C(1)-C(2) bond length is 1.38 Å. The C(1)-C(5) bond length is 1.43 Å. The C(1)-S(1) bond length is 1.78 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(3) atom. The C(2)-C(3) bond length is 1.41 Å. The C(2)-H(3) bond length is 1.09 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(2), one C(4), and one H(4) atom. The C(3)-C(4) bond length is 1.38 Å. The C(3)-H(4) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted single-bond geometry to one C(3), one C(5), and one H(5) atom. The C(4)-C(5) bond length is 1.42 Å. The C(4)-H(5) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(1), one C(4), and one C(5) atom. The C(5)-C(5) bond length is 1.44 Å. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(1) atom. The H(2)-O(1) bond length is 0.99 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(3) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(4) atom. S(1) is bonded in a distorted trigonal non-coplanar geometry to one C(1), one O(2), one O(3), and one O(4) atom. The S(1)-O(2) bond length is 1.48 Å. The S(1)-O(3) bond length is 1.48 Å. The S(1)-O(4) bond length is 1.46 Å. There are four inequivalent O sites. In the first O site, O(2) is bonded in a distorted single-bond geometry to one Ba(1) and one S(1) atom. In the second O site, O(3) is bonded in a distorted single-bond geometry to one Ba(1) and one S(1) atom. In the third O site, O(4) is bonded in a distorted single-bond geometry to one Ba(1) and one S(1) atom. In the fourth O site, O(1) is bonded in a water-like geometry to one Ba(1), one H(1), and one H(2) atom. Linkers: 2 [O]S([O])([O])c1cccc2c(S([O])([O])[O])cccc12 ,2 [O]S([O])([O])c1[c]ccc2c(S([O])([O])[O])cccc12. Metal clusters: 2 [Ba]. The MOF has largest included sphere 1.82 A, density 2.30 g/cm3, surface area 3078.67 m2/g, accessible volume 0.08 cm3/g