Thomsenolite is a mineral with formula: NaCaAlF6·H2O. It is an alteration product of cryolite. It was discovered in 1868 in Ivigtut, Greenland and named for Hans Peter Jorgen Julius Thomsen (1826–1909). References Sodium minerals Calcium minerals Aluminium minerals Fluorine minerals Monoclinic minerals Minerals in space group 14