Selective leaching and separation of aluminum and potassium from alunite by fluorosilicic acid: Kinetics and mechanistic insights - Wen Tan; Yanbo Yang; Junjie Zhang; Chengchao Liu; Yibo Li; Suofeiya Ba; Wei Weng; Xiaopeng Chi; Ni Xiao; Jiaozhong Cai; Shuiping Zhong (Minerals Engineering, 2026)