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Halide

Håleniusite-(La)

LaOF
Crystal systemCubic
ClassHalide
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Håleniusite-(La) specimen

Håleniusite-(La) Locality: Bastnäs mines, Riddarhyttan, Skinnskatteberg, Västmanland, Sweden Size: 5.0 cm x 3.0 cm x 1.5 cm A fantastic combination specimen from the historic Bastnas ore field. Pale yellow, subhedral aggregates of the rare earth oxyhalide haleniusite are intimately intergrown with lavender-gray, massive cerite-(Ce), dark green-gray tornebohmite-(La), black, granular massive ferriallanite, sub-radial sheaves of an amphibole group mineral, and vibrant green, radial aggregates of brochantite. Swedish Natural History Museum and Paulo Matioli labels. Photos by Tom and Melissa Campbell. — Photo: Robert M. Lavinsky · CC BY-SA 3.0

Håleniusite-(La)

Håleniusite-(La), chemical formula (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.

Intro adapted from Wikipedia (CC BY-SA).

Håleniusite-(La) is an IMA-recognized mineral species in the halide class, with the chemical formula LaOF.

It crystallizes in the cubic crystal system (space group Fm3m). It is a member of the Fluorite structural group.

IMA symbol Hål-La, IMA status: approved, named in 2003.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet. Browse more H minerals or help write this entry.