REE-, Sr-, Ca-aluminum-phosphate-sulfate minerals of the alunite supergroup and their role as hosts for radionuclides. - Owen, Nicholas D.; Cook, Nigel J.; Rollog, Mark; Ehrig, Kathy J.; Schmandt, Danielle S.; Ram, Rahul; Brugger, Joël; Ciobanu, Cristiana L.; Wade, Benjamin; Guagliardo, Paul (American Mineralogist, 2019)