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).
| Håleniusite-(La) | |
|---|---|
-704037.jpg.webp) Håleniusite-(La) (yellow) with other minerals | |
| General | |
| Category | Mineral |
| Formula (repeating unit) | (La,Ce)OF |
| IMA symbol | Hål-La[1] |
| Strunz classification | 3/A.08-25 |
| Crystal system | Isometric |
| Space group | Fm3m (No. 225) |
| Unit cell | 178.26 ų (Calculated from Unit Cell) |
| Identification | |
| Formula mass | 174.90 gm |
| Colour | Lemon yellow to ochre yellow |
| Luster | Dull, earthy |
| Streak | Light yellow |
| Diaphaneity | Translucent |
| Specific gravity | 6.5 |
| Density | 6.5 g/cm3 (Measured) |
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
- Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.