Chong-An Chen, Yang Li, Congcong Jin, Kang Min Ok. "CsICl<sub>2</sub>: A Record-Birefringent Inorganic Crystal with Ultrawide Infrared Transparency Enabled by Linear Interhalogen ICl<sub>2</sub><sup>–</sup> Units." Journal of the American Chemical Society, 2025. doi:10.1021/jacs.5c10200