CsCdCO3Br2 crystallizes in the orthorhombic Cmcm space group. Cs(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent Br(1), and four equivalent Br(2) atoms. The Cs(1)-O(2) bond length is 3.25 Å. There are a spread of Cs(1)-Br(1) bond distances ranging from 3.61-3.94 Å. There are two shorter (3.79 Å) and two longer (3.90 Å) Cs(1)-Br(2) bond lengths. Cd(1) is bonded to one O(2), two equivalent O(1), one Br(1), and two equivalent Br(2) atoms to form corner-sharing CdBr3O3 octahedra. The corner-sharing octahedral tilt angles are 72°. The Cd(1)-O(2) bond length is 2.40 Å. Both Cd(1)-O(1) bond lengths are 2.32 Å. The Cd(1)-Br(1) bond length is 2.63 Å. Both Cd(1)-Br(2) bond lengths are 2.73 Å. C(1) is bonded in a distorted bent 120 degrees geometry to two equivalent O(1) atoms. Both C(1)-O(1) bond lengths are 1.25 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cd(1) and one C(1) atom. In the second O site, O(2) is bonded in a water-like geometry to one Cs(1) and one Cd(1) atom. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 5-coordinate geometry to four equivalent Cs(1) and one Cd(1) atom. In the second Br site, Br(2) is bonded in a distorted water-like geometry to four equivalent Cs(1) and two equivalent Cd(1) atoms. Linkers: 4 [O]C(=O)C([O])=O. Metal clusters: 8 [Cs] ,8 [Cd]. The MOF has largest included sphere 4.96 A, density 3.26 g/cm3, surface area 2137.82 m2/g, accessible volume 0.11 cm3/g