Citation: Moon, Keon Ho; Avdeev, Maxim; Kim, Young-Il (2017). Crystal structure and optical property of complex perovskite oxynitrides ALi 0.2 Nb 0.8 O 2.8 N 0.2 , ANa 0.2 Nb 0.8 O 2.8 N 0.2 , and AMg 0.2 Nb 0.8 O 2.6 N 0.4 (A = Sr, Ba). Journal of Solid State Chemistry, 254, pp. 1-8.