Lithium isotope fractionation in LCT pegmatite systems: a density functional theory study. - Lin, He-Feng; Zhu, Wen-Bin; Wei, Hai-Zhen; Xu, Xi-Sheng; Xu, Zhi-Qin; Palmer, M.R.; Chen, Shuang; Ma, Jing; Li, Yin-Chuan; Zuo, Da-Sheng; Yang, Ke (Geochimica et Cosmochimica Acta, 2026)