Synthesis, crystal structure, and properties of a perovskite-related bismuth phase, (NH4)3Bi2I9 (Synthesis, Crystal Structure and Properties of a Perovskite-Related Bismuth Phase, (NH4)3Bi2I9)
Shijing Sun, Satoshi Tominaka, Jung-Hoon Lee, Fei Xie, Paul D. Bristowe, Anthony K. Cheetham.