GdC3H2O7CH2 crystallizes in the triclinic P-1 space group. The structure consists of two 02329_fluka molecules inside a GdC3H2O7 framework. In the GdC3H2O7 framework, Gd(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), two equivalent O(1), and two equivalent O(4) atoms. The Gd(1)-O(2) bond length is 2.60 Å. The Gd(1)-O(3) bond length is 2.49 Å. The Gd(1)-O(5) bond length is 2.46 Å. The Gd(1)-O(6) bond length is 2.42 Å. The Gd(1)-O(7) bond length is 2.38 Å. There is one shorter (2.43 Å) and one longer (2.48 Å) Gd(1)-O(1) bond length. There is one shorter (2.49 Å) and one longer (2.53 Å) Gd(1)-O(4) bond length. There are three 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 1.30 Å. The C(1)-O(2) bond length is 1.25 Å. In the second C site, C(3) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(5) atom. The C(3)-O(3) bond length is 1.27 Å. The C(3)-O(5) bond length is 1.26 Å. In the third C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(4) and one O(6) atom. The C(4)-O(4) bond length is 1.28 Å. The C(4)-O(6) bond length is 1.27 Å. There are two inequivalent H sites. In the first H site, H(3) is bonded in a single-bond geometry to one O(5) and one O(7) atom. The H(3)-O(5) bond length is 1.70 Å. The H(3)-O(7) bond length is 0.99 Å. In the second H site, H(4) is bonded in a single-bond geometry to one O(7) atom. The H(4)-O(7) bond length is 0.99 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Gd(1) and one C(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one Gd(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Gd(1) and one C(3) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Gd(1) and one C(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Gd(1), one C(3), and one H(3) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one Gd(1) and one C(4) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Gd(1), one H(3), and one H(4) atom. Linkers: 2 [O]C(=O)CC([O])=O ,1 [O]C(=O)C([O])=O. Metal clusters: 2 [Gd]. The MOF has largest included sphere 1.41 A, density 3.33 g/cm3, surface area 1638.80 m2/g, accessible volume 0.02 cm3/g