Håleniusite-(La), chemical formula . is a yellow isometric

mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2011): Mi ...

. It has a dull, earthy lustre. The geological setting of håleniusite-(La) is in

vug A vug, vugh, or vugg () is a small- to medium-sized cavity inside rock. It may be formed through a variety of processes. Most commonly, cracks and fissures opened by tectonic activity ( folding and faulting) are partially filled by quartz, calc ...

s and leaching zones of massive ferriallanite-(Ce), intimately intergrown with cerite-(Ce) and

bastnäsite The mineral bastnäsite (or bastnaesite) is one of a family of three fluorocarbonate minerals, which includes bastnäsite-(cerium, Ce) with a formula of (Ce, La)CO3F, bastnäsite-(lanthanum, La) with a formula of (La, Ce)CO3F, and bastnäsite-(yt ...

-(La). It was discovered in 1986 at Bastnäs mines, Riddarhyttan, Skinnskatteberg,

Västmanland Västmanland ( or ) is a historical Swedish province, or , in middle Sweden. It borders Södermanland, Närke, Värmland, Dalarna and Uppland. Västmanland means "West Man Land" or, less literally, "The Land of the Western Men", where the "we ...

, Sweden and named in honour of Ulf Hålenius, director of the mineralogy department at the

Swedish Museum of Natural History The Swedish Museum of Natural History (), in Stockholm, is one of two major museums of natural history in Sweden, the other one being located in Gothenburg. The museum was founded in 1819 by the Royal Swedish Academy of Sciences, but goes bac ...

Stockholm Stockholm (; ) is the Capital city, capital and List of urban areas in Sweden by population, most populous city of Sweden, as well as the List of urban areas in the Nordic countries, largest urban area in the Nordic countries. Approximately ...

Sweden Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...

References

Mindat.org

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Lanthanide minerals Fluorine minerals Cubic minerals Minerals in space group 225 {{halide-mineral-stub