Scandio-fluoro-eckermannite, NaNa2(Mg4Sc)(Si8O22)F2, a new Sc-dominant amphibole-supergroup mineral from the Bayan Obo deposit, China. - Liu, Shuang-Liang; Fan, Hong-Rui; Gu, Xiang-Ping; She, Hai-Dong; Yang, Kui-Feng; Li, Xiao-Chun; Wang, Qi-Wei; Yang, Zhan-Feng; Zhao, Yong-Gang; Wang, Fenggang; Liu, Xuan (American Mineralogist, 2026)