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A non-interpenetrating 3D metal–organic framework, synthesized by a solvothermal reaction of cadmium nitrate and a tetracarboxylate ligand, is the first metal–organic analogue of fluorite (CaF2). In the structure of the title compound, depicted, an eight-connecting tetranuclear cadmium cluster (green sphere) and a tetracarboxylate ligand (brown sphere) play the role of Ca2+ and F− ions, respectively, in fluorite.
Chun et al. (Wed,) studied this question.