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ChemInform Abstract

The title compounds are prepared by reaction of the elements at 750 °C followed by annealing at 800 °C. The compounds crystallize in the GaMo₄S₈-type structure (space group F equation image 3m, Z = 4). The structure is built up by cubane-like V₄Q₈ units and GeQ₄ tetrahedra arranged in the NaCl manner. Electron density and electron localization function maps reveal that the previous description of these materials as spinels is not appropriate. GeV₄S₈ is an antiferromagnetic semiconductor (T_N = 13 K) showing an anomaly in the magnetic susceptibility at 196 K.