Håleniusite-(La)

Håleniusite-(La) (La,Ce)OF is a yellow isometric mineral.  It has a dull, earthy lustre. The geological setting of håleniusite-(La) is in vugs and leaching zones of massive ferriallanite-(Ce), intimately intergrown with cerite-(Ce) and bastnäsite-(La). 

It was discovered in 1986 at Bastnäs mines, Riddarhyttan, Skinnskatteberg, Västmanland, Sweden and named in honour of Ulf Hålenius, director of the mineralogy department at the Swedish Museum of Natural History in Stockholm, Sweden.

References
 Mindat.org
 webmineral

Category:Lanthanide minerals
Category:Fluorine minerals
Category:Cubic minerals