Abstract

Single crystals of nonadecabarium nonaindium nonanitride, Ba19In9N9, were synthesized by the Na flux method under N2 pressure. The compound crystallizes in the monoclinic space group C2/m, with Z = 2. Polyanionic indium clusters [In5]5− and [In8]12− are surrounded by Ba2+ cations and are located in a flat cage built of linked nitro­gen-centred NBa6 octahedra. The structural formula is expressed as (Ba38N18)[In5]2[In8].

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