Category Halide mineral Strunz classification 3.CC.10 Space group C2/c | Formula
(repeating unit) SrAlF4OH·(H2O) Crystal system Monoclinic | |
Crystal class Prismatic (2/m)
(same H-M symbol) | ||
Acuminite is a rare halide mineral of with chemical formula: SrAlF4(OH)·(H2O). Its name comes from the Latin word acumen, meaning "spear point". Its Mohs scale rating is 3.5.
Acumenite has only been described from its type locality of the cryolite deposit in Ivigtut, Greenland.
References
Acuminite Wikipedia(Text) CC BY-SA