Sr₁₁Ge₄N₆: a new nitride composed of [GeN₂Sr₇]⁴⁺ antiperovskite-type slabs and [Sr₄Ge]⁴⁺ layers, separated by sheets of bent [GeᴵᴵN₂]⁴⁻ ions

The layered nitride Sr₁₁Ge₄N₆ contains Ge⁴⁻ Zintl anions in both [Sr₄Ge]⁴⁺ layers and [GeN₂Sr₇]⁴⁺ antiperovskite-type slabs which are separated by sheets of bent [GeᴵᴵN₂]⁴⁻ ions; the observed range of formal germanium oxidation states in nitrides thus extends between +4 and −4.