GdC3H4O8(CH2)3 crystallizes in the monoclinic P2_1/c space group. The structure consists of twelve 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 2.44 Å. The Gd(1)-O(2) bond length is 2.30 Å. The Gd(1)-O(3) bond length is 2.41 Å. The Gd(1)-O(4) bond length is 2.47 Å. The Gd(1)-O(5) bond length is 2.44 Å. The Gd(1)-O(6) bond length is 2.35 Å. The Gd(1)-O(7) bond length is 2.36 Å. The Gd(1)-O(8) bond length is 2.40 Å. There are three inequivalent C sites. In the first C site, C(6) is bonded in a distorted bent 120 degrees geometry to one O(1) and one O(8) atom. The C(6)-O(1) bond length is 1.27 Å. The C(6)-O(8) bond length is 1.26 Å. In the second C site, C(1) is bonded in a distorted bent 120 degrees geometry to one O(2) and one O(3) atom. The C(1)-O(2) bond length is 1.27 Å. The C(1)-O(3) bond length is 1.28 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(5) atom. The C(3)-O(4) bond length is 1.28 Å. The C(3)-O(5) bond length is 1.28 Å. There are four inequivalent H sites. In the first H site, H(8) is bonded in a single-bond geometry to one O(6) atom. The H(8)-O(6) bond length is 0.99 Å. In the second H site, H(9) is bonded in a distorted linear geometry to one O(3) and one O(7) atom. The H(9)-O(3) bond length is 1.60 Å. The H(9)-O(7) bond length is 1.01 Å. In the third H site, H(10) is bonded in a distorted single-bond geometry to one O(4) and one O(6) atom. The H(10)-O(4) bond length is 1.68 Å. The H(10)-O(6) bond length is 1.00 Å. In the fourth H site, H(7) is bonded in a single-bond geometry to one O(7) atom. The H(7)-O(7) bond length is 0.99 Å. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Gd(1) and one C(6) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Gd(1) and one C(6) atom. In the third O site, O(2) is bonded in a distorted linear geometry to one Gd(1) and one C(1) atom. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one Gd(1), one C(1), and one H(9) atom. In the fifth O site, O(7) is bonded in a distorted water-like geometry to one Gd(1), one H(7), and one H(9) atom. In the sixth O site, O(4) is bonded in a distorted single-bond geometry to one Gd(1), one C(3), and one H(10) atom. In the seventh O site, O(5) is bonded in a distorted single-bond geometry to one Gd(1) and one C(3) atom. In the eighth O site, O(6) is bonded in a distorted water-like geometry to one Gd(1), one H(10), and one H(8) atom. Linkers: 4 [O]C(=O)CCCC([O])=O ,2 [O]C(=O)C([O])=O. Metal clusters: 4 [Gd]. RCSR code: bey. The MOF has largest included sphere 2.07 A, density 2.49 g/cm3, surface area 2748.83 m2/g, accessible volume 0.08 cm3/g