GdC3H4O8(CH2)2 crystallizes in the monoclinic C2/c space group. The structure consists of sixteen 02329_fluka molecules inside a GdC3H4O8 framework. In the GdC3H4O8 framework, Gd(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Gd(1)-O(1) bond length is 2.40 Å. The Gd(1)-O(2) bond length is 2.40 Å. The Gd(1)-O(3) bond length is 2.25 Å. The Gd(1)-O(4) bond length is 2.25 Å. The Gd(1)-O(5) bond length is 2.47 Å. The Gd(1)-O(6) bond length is 2.47 Å. The Gd(1)-O(7) bond length is 2.52 Å. The Gd(1)-O(8) bond length is 2.52 Å. There are three inequivalent C sites. In the first C site, C(6) is bonded in a distorted bent 120 degrees geometry to two equivalent O(6) atoms. Both C(6)-O(6) bond lengths are 1.27 Å. In the second C site, C(1,2) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(3) atom. The C(1,2)-O(1) bond length is 1.27 Å. The C(1,2)-O(3) bond length is 1.28 Å. In the third C site, C(5) is bonded in a distorted bent 120 degrees geometry to two equivalent O(5) atoms. Both C(5)-O(5) bond lengths are 1.27 Å. There are four inequivalent H sites. In the first H site, H(7) is bonded in a single-bond geometry to one O(7) atom. The H(7)-O(7) bond length is 0.97 Å. In the second H site, H(8) is bonded in a single-bond geometry to one O(8) atom. The H(8)-O(8) bond length is 0.97 Å. In the third H site, H(5) is bonded in a single-bond geometry to one O(6) and one O(7) atom. The H(5)-O(6) bond length is 1.70 Å. The H(5)-O(7) bond length is 1.00 Å. In the fourth H site, H(6) is bonded in a single-bond geometry to one O(5) and one O(8) atom. The H(6)-O(5) bond length is 1.70 Å. The H(6)-O(8) bond length is 1.00 Å. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Gd(1) and one C(1,2) atom. The O(4)-C(1,2) bond length is 1.28 Å. In the second O site, O(5) is bonded in a distorted trigonal planar geometry to one Gd(1), one C(5), and one H(6) atom. In the third O site, O(6) is bonded in a distorted trigonal planar geometry to one Gd(1), one C(6), and one H(5) atom. In the fourth O site, O(7) is bonded in a water-like geometry to one Gd(1), one H(5), and one H(7) atom. In the fifth O site, O(8) is bonded in a water-like geometry to one Gd(1), one H(6), and one H(8) atom. In the sixth O site, O(1) is bonded in a bent 120 degrees geometry to one Gd(1) and one C(1,2) atom. In the seventh O site, O(2) is bonded in a bent 120 degrees geometry to one Gd(1) and one C(1,2) atom. The O(2)-C(1,2) bond length is 1.27 Å. In the eighth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Gd(1) and one C(1,2) atom. Linkers: 4 [O]C(=O)CCC([O])=O ,2 [O]C(=O)C([O])=O. Metal clusters: 4 [Gd]. The MOF has largest included sphere 2.67 A, density 2.28 g/cm3, surface area 2628.51 m2/g, accessible volume 0.14 cm3/g