Citation: Saiduzzaman, M.; Hossain, K.M.; Kumada, N.; Yanagida, S.; Takei, T.; Hanada, Y.; Nagao, M.; Azuma, M. (2020). Hydrothermal synthesis and crystal structure of a mixed-valence pyrochlore-type strontium bismuthate, (Sr0.75Bi0.25)2Bi2O6.83. Journal of the Ceramic Society of Japan, 128, pp. 660-663.