SrH4(C2O)4 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form edge-sharing SrO6 octahedra. The Sr(1)-O(2) bond length is 2.45 Å. The Sr(1)-O(4) bond length is 2.45 Å. Both Sr(1)-O(1) bond lengths are 2.54 Å. There is one shorter (2.53 Å) and one longer (2.54 Å) Sr(1)-O(3) bond length. There are eight inequivalent C sites. In the first C site, C(4) is bonded in a distorted trigonal planar geometry to one C(2); one C(6); and one H(2,3) atom. The C(4)-C(2) bond length is 1.40 Å. The C(4)-C(6) bond length is 1.39 Å. The C(4)-H(2,3) bond length is 1.09 Å. In the second C site, C(5) is bonded in a distorted trigonal planar geometry to one C(3); one C(7); and one H(2,3) atom. The C(5)-C(3) bond length is 1.39 Å. The C(5)-C(7) bond length is 1.40 Å. The C(5)-H(2,3) bond length is 1.09 Å. In the third C site, C(6) is bonded in a distorted single-bond geometry to one C(4); one C(7); and one H(1,4) atom. The C(6)-C(7) bond length is 1.40 Å. The C(6)-H(1,4) bond length is 1.09 Å. In the fourth C site, C(7) is bonded in a trigonal planar geometry to one C(5), one C(6), and one C(8) atom. The C(7)-C(8) bond length is 1.50 Å. In the fifth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(3), and one O(4) atom. The C(8)-O(3) bond length is 1.29 Å. The C(8)-O(4) bond length is 1.26 Å. In the sixth 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 1.50 Å. The C(1)-O(1) bond length is 1.29 Å. The C(1)-O(2) bond length is 1.26 Å. In the seventh C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.40 Å. In the eighth C site, C(3) is bonded in a distorted single-bond geometry to one C(2); one C(5); and one H(1,4) atom. The C(3)-H(1,4) bond length is 1.09 Å. There are two inequivalent H sites. In the first H site, H(1,4) is bonded in a single-bond geometry to one C(3) atom. In the second H site, H(2,3) is bonded in a single-bond geometry to one C(4) atom. There are four inequivalent O sites. In the first O site, O(4) is bonded in a bent 150 degrees geometry to one Sr(1) and one C(8) atom. In the second O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one C(8) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one C(1) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one Sr(1) and one C(1) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)cc1. Metal clusters: 4 [Sr]. The MOF has largest included sphere 1.61 A, density 2.18 g/cm3, surface area 2949.29 m2/g, accessible volume 0.06 cm3/g