CdH4(CO3)2(CH2)2 crystallizes in the monoclinic P2_1/c space group. The structure consists of eight 02329_fluka molecules inside a CdH4(CO3)2 framework. In the CdH4(CO3)2 framework, Cd(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(5), one O(6), and two equivalent O(4) atoms. The Cd(1)-O(1) bond length is 2.49 Å. The Cd(1)-O(2) bond length is 2.33 Å. The Cd(1)-O(5) bond length is 2.33 Å. The Cd(1)-O(6) bond length is 2.31 Å. There is one shorter (2.30 Å) and one longer (2.37 Å) Cd(1)-O(4) bond length. There are two 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 1.28 Å. The C(1)-O(2) bond length is 1.28 Å. In the second C site, C(4) is bonded in a distorted bent 120 degrees geometry to one O(3) and one O(4) atom. The C(4)-O(3) bond length is 1.26 Å. The C(4)-O(4) bond length is 1.29 Å. There are four inequivalent H sites. In the first H site, H(8) is bonded in a single-bond geometry to one O(2) and one O(6) atom. The H(8)-O(2) bond length is 1.71 Å. The H(8)-O(6) bond length is 1.00 Å. In the second H site, H(5) is bonded in a single-bond geometry to one O(5) atom. The H(5)-O(5) bond length is 0.98 Å. In the third H site, H(6) is bonded in a single-bond geometry to one O(5) atom. The H(6)-O(5) bond length is 1.00 Å. In the fourth H site, H(7) is bonded in a distorted linear geometry to one O(1) and one O(6) atom. The H(7)-O(1) bond length is 1.62 Å. The H(7)-O(6) bond length is 1.01 Å. There are six inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Cd(1) and one C(4) atom. In the second O site, O(5) is bonded in a distorted water-like geometry to one Cd(1), one H(5), and one H(6) atom. In the third O site, O(6) is bonded in a distorted water-like geometry to one Cd(1), one H(7), and one H(8) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one C(4) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one Cd(1), one C(1), and one H(7) atom. In the sixth O site, O(2) is bonded in a distorted single-bond geometry to one Cd(1), one C(1), and one H(8) atom. Linkers: 4 [O]C(=O)CCC([O])=O. Metal clusters: 2 O.O.O.O.O=[C]O[Cd]1O[C]O1.O=[C]O[Cd]1O[C]O1. RCSR code: sql. The MOF has largest included sphere 1.93 A, density 2.35 g/cm3, surface area 3200.05 m2/g, accessible volume 0.08 cm3/g