An Icosahedral 55-Atom Iron Hydride Cluster Protected by Tri-tert-butylphosphines - Tatsuya Higaki; Kanata Tanaka; Hitoshi Izu; Shunya Oishi; Koki Kawamoto; Mizuki Tada; W. M. C. Sameera; Ryo Takahata; Toshiharu Teranishi; Soichi Kikkawa; Seiji Yamazoe; Takuya Shiga; et al. (Journal of the American Chemical Society, 2025)