On the walls of fractures Filled with nepheline in alkalic pegmatite in a differentiated alkalic massif (Lovozero massif, Russia).
Approved IMA 1973
From the Jubilee pegmatite, on Mt. Karnasurt, near the valley of the Ilmajok River, Lovozero massif, and in the Khibiny massif, Kola Peninsula, Russia. At Mont Saint-Hilaire, Quebec, C Link to MinDat.org Location Data.
Named in honor of the international group of scientists, captained by Thor Heyerdahl, crewing the papyrus ship Ra (1969-1970).