Sr2C10H4O9 crystallizes in the monoclinic C2/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Both Sr(1)-O(1) bond lengths are 2.56 Å. Both Sr(1)-O(3) bond lengths are 2.53 Å. Both Sr(1)-O(4) bond lengths are 2.66 Å. Both Sr(1)-O(5) bond lengths are 2.64 Å. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. The Sr(2)-O(2) bond length is 2.70 Å. Both Sr(2)-O(1) bond lengths are 2.72 Å. Both Sr(2)-O(3) bond lengths are 2.58 Å. Both Sr(2)-O(4) bond lengths are 2.52 Å. Both Sr(2)-O(5) bond lengths are 3.06 Å. There are five inequivalent C sites. In the first C site, C(3) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(2) atom. The C(3)-C(2) bond length is 1.40 Å. The C(3)-C(4) bond length is 1.40 Å. The C(3)-H(2) bond length is 1.09 Å. In the second C site, C(4) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(5) atom. The C(4)-C(2) bond length is 1.41 Å. The C(4)-C(5) bond length is 1.51 Å. In the third C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(4), and one O(5) atom. The C(5)-O(4) bond length is 1.28 Å. The C(5)-O(5) bond length is 1.27 Å. In the fourth C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(3) atom. The C(1)-C(2) bond length is 1.49 Å. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(3) bond length is 1.27 Å. In the fifth C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. There are two 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 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one C(1) atom. In the second O site, O(2) is bonded in a water-like geometry to one Sr(2) and two equivalent H(1) atoms. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one C(5) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one C(5) atom. Linkers: 2 [O]C(=O)c1cc(C([O])=O)c(C([O])=O)cc1C([O])=O. Metal clusters: 4 [Sr]. The MOF has largest included sphere 1.11 A, density 2.71 g/cm3, surface area 1831.39 m2/g, accessible volume 0.04 cm3/g