Aldermanite is a rare hydrated phosphate mineral with formula Mg₅Al₁₂(PO₄)₈(OH)₂₂·32H₂O. It's named after Arthur Richard Alderman (1901-1980), Professor of Geology and Mineralogy, University of Adelaide. Its type locality is Moculta Phosphate Quarry (Klemm's Quarry), Angaston, Barossa Valley, North Mount Lofty Ranges, Mount Lofty Ranges, South Australia, Australia.