Sr(C2O3)2 crystallizes in the orthorhombic P2_12_12_1 space group. Sr(1) is bonded in a distorted hexagonal planar geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Sr(1)-O(1) bond length is 2.61 Å. The Sr(1)-O(2) bond length is 2.56 Å. The Sr(1)-O(3) bond length is 2.69 Å. The Sr(1)-O(4) bond length is 2.63 Å. The Sr(1)-O(5) bond length is 2.56 Å. The Sr(1)-O(6) bond length is 2.53 Å. There are four inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(2) atom. The C(1)-O(1) bond length is 1.24 Å. The C(1)-O(2) bond length is 1.27 Å. In the second C site, C(2) is bonded in a distorted single-bond geometry to one O(3) atom. The C(2)-O(3) bond length is 1.44 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one O(4) atom. The C(3)-O(4) bond length is 1.43 Å. In the fourth C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(5) and one O(6) atom. The C(4)-O(5) bond length is 1.26 Å. The C(4)-O(6) bond length is 1.26 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1) and one C(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sr(1) and one C(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one C(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one C(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one C(4) atom. Linkers: 4 [O][C]([C]([O])C([O])=O)C([O])=O. Metal clusters: 4 [Sr]. The MOF has largest included sphere 3.89 A, density 1.54 g/cm3, surface area 3148.64 m2/g, accessible volume 0.34 cm3/g