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Zusammenfassung:
The first nitridogermanates(III) Ca-6[Ge2N6] and Sr-6[Ge2N6] were synthesized from sodium flux and structurally characterized by powder and single crystal X-ray diffraction, respectively. They crystallize isostructurally to each other and homeotypic to Ca-6[Cr2N6]H in space group R3? . They feature unprecedented, mutually isolated, ethane-like [(Ge2N6)-N-III](12-) anions in a staggered conformation. The compounds are semiconductors according to resistivity measurements and electronic structure calculations, yielding band gaps of 1.1 eV for Ca-6[Ge2N6] and 0.2 eV for Sr-6[Ge2N6].