A novel type of supertetrahedral connectivity is exhibited by the 72-atom discrete supercubooctahedron in (Cs6Cl)2Cs5[Ga15Ge9Se48] (1), which undergoes both cation and anion exchange, as revealed by unambiguous single-crystal X-ray diffraction data. Electronic-structure studies helped to understand the Ge/Ga distribution.
Keywords: chalcogenides; cluster compounds; ion exchange; solid-state reactions; solid-state structures.
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