What is "arctite"

n. (context mineral English) A colourless mineral made of a trigonal crystal system and found in northern Russia.

Arctite ( Na Ca( P O) F) is a colourless mineral found in the Kola Peninsula northern Russia. It's Mohs hardness is 5 and has a density of 3.11-3.13. Arctite is transparent with a vitreous lustre. Arctite has a perfect cleavage and a trigonal crystal system.

Common associates of arctite include aegirine, natisite, lomonosovite, umbite and thenardite.