Layered hydroxyl sulfate: Controlled crystallization, structure analysis, and green derivation of multi-color luminescent (La,RE) 2 O 2 SO 4 and (La,RE) 2 O 2 S phosphors (RE = Pr, Sm, Eu, Tb, and Dy) (Layered hydroxyl sulfate: controlled crystallization, structure analysis, and green derivation of multi-color luminescent (La,RE)2O2SO4 and (La, RE)2O2S phosphors (RE = Pr, Sm, Eu, Tb, and Dy))