Abstract. Polycrystalline tritantalum pentanitride (Ta3Ns) has been prepared from the reaction of TaC15 with ammonia, and its structure has been refined from time-of-flight neutron diffraction data.
Chains of face‐sharing, N‐centered, trigonal Ba6 antiprisms (shown here) with Na atoms between the chains is a description of the structure of the title compound. The columns of Ba atoms ([Ba2+]3N3−)3e− centered by N atoms show ionic bonding within, but metallic bonding on the “skin” as well as between the columns and the Na atoms, leading to the overall metallic character of the compound.
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