(LuCdH12(C4O5)3)2Cd(H2O)6 crystallizes in the cubic Fd-3c space group. The structure consists of sixteen Cd(H2O)6 clusters inside a LuCdH12(C4O5)3 framework. In each Cd(H2O)6 cluster, Cd(2) is bonded in an octahedral geometry to six equivalent O(4) atoms. All Cd(2)-O(4) bond lengths are 2.31 Å. H(3) is bonded in a single-bond geometry to one O(4) atom. The H(3)-O(4) bond length is 0.98 Å. O(4) is bonded in a distorted trigonal planar geometry to one Cd(2) and two equivalent H(3) atoms. In the LuCdH12(C4O5)3 framework, Lu(1) is bonded in a 9-coordinate geometry to three equivalent O(3) and six equivalent O(2) atoms. All Lu(1)-O(3) bond lengths are 2.39 Å. All Lu(1)-O(2) bond lengths are 2.31 Å. Cd(1) is bonded in an octahedral geometry to six equivalent O(1) atoms. All Cd(1)-O(1) bond lengths are 2.29 Å. There are two inequivalent C sites. In the first C site, C(2) is bonded in a distorted trigonal non-coplanar geometry to one H(1), one H(2), and one O(3) atom. The C(2)-H(1) bond length is 1.10 Å. The C(2)-H(2) bond length is 1.10 Å. The C(2)-O(3) bond length is 1.42 Å. In the second 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 1.26 Å. The C(1)-O(2) bond length is 1.28 Å. There are two inequivalent H sites. In the first H site, H(2) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(1) is bonded in a single-bond geometry to one C(2) atom. There are three inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Lu(1) and one C(1) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Cd(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Lu(1) and two equivalent C(2) atoms. Linkers: 24 [O]C(=O)COCC([O])=O. Metal clusters: 8 [Lu] ,8 [Cd] ,1 O.O.O.O.O.O.[Cd]. The MOF has largest included sphere 3.27 A, density 2.40 g/cm3, surface area 2834.89 m2/g, accessible volume 0.10 cm3/g