Kationenverbände in Nitridometallat-Nitriden und Cyanamid-Nitriden der Erdalkalimetalle

(Ca7N4)[Mx] (M=Ag, Ga, In, Tl): Linear Metal Chains as Guests in a Subnitride Host

“…A large number of ternary nitrides of the alkaline‐earth metals (EA) with main‐group or transition‐metal elements contain “isolated” nitride ions, which are in an octahedral coordination environment and surrounded only by EA atoms. Condensation of the coordination polyhedra (EA 6 N) through common corners and edges leads to structural patterns of various dimensionalities with different kinds of cavities,1 which contain main‐group and transition‐metal species with various homo‐ or heteronuclear interconnections (e.g., (Sr 6 N)[Ga 5 ],2 (Sr 5 N)[NbN 4 ],3 (Ca 3 N) 2 [FeN 3 ],4 (Ca 4 N)[In 2 ],5 (Ca 3 N)[Au]6). Ternary nitrides with the composition (Ca 7 N 4 )[M x ] (M=Ag, Ga, In, Tl) were first investigated in the late 1990s 7.…”