The Collaborative International Dictionary
Thomsenolite
Thomsenolite \Thom"sen*o*lite\, n. [Named after Dr. J. Thomsen of Copenhagen. See -lite.] (Min.) A fluoride of aluminium, calcium, and sodium occurring with the cryolite of Greenland.
Wiktionary
thomsenolite
n. (context mineralogy English) A monoclinic-prismatic mineral containing aluminum, calcium, fluorine, hydrogen, oxygen, and sodium.
Wikipedia
Thomsenolite
Thomsenolite is a mineral with formula: NaCaAlF·HO. 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).