BaP(6)N(10)NH:Eu(2+) as a Case Study–An Imidonitridophosphate Showing Luminescence

Barium imidonitridophosphate BaP(6)N(10)NH was synthesized at 5 GPa and 1000 °C with a high‐pressure high‐temperature approach using the multianvil technique. Ba(N(3))(2), P(3)N(5) and NH(4)Cl were used as starting materials, applying a combination of azide and mineralizer routes. The structure elucidation of BaP(6)N(10)NH (P6(3), a=7.5633(11), c=8.512(2) Å, Z=2) was performed by a combination of transmission electron microscopy and single‐crystal diffraction with microfocused synchrotron radiation. Phase purity was verified by Rietveld refinement. (1)H and (31)P solid‐state NMR and FTIR spectroscopy are consistent with the structure model. The chemical composition was confirmed by energy‐dispersive X‐ray spectroscopy and CHNS analyses. Eu(2+)‐doped samples of BaP(6)N(10)NH show blue emission upon excitation with UV to blue light (λ (em)=460 nm, fwhm=2423 cm(−1)) representing unprecedented Eu(2+)‐luminescence of an imidonitride.