Derriksite
| Derriksite | |
|---|---|
|
| |
| General | |
| Category | Oxide minerals |
| Formula (repeating unit) | Cu4(UO2)(SeO3)2(OH)6•H2O |
| Strunz classification | 4.JG.30 |
| Crystal system | Orthorhombic |
| Crystal class |
Pyramidal (mm2) H-M symbol: (mm2) |
| Space group | Pn21m |
| Identification | |
| Colour | Bottle green, green |
| Cleavage | {???} perfect, {010} good |
| Diaphaneity | Translucent |
| Specific gravity | 4.72 |
Derriksite is a very rare uranium mineral with the chemical formula Cu4(UO2)(SeO3)2(OH)6•H2O. It is a secondary mineral that contains copper, uranium and the rarer selenium. It is a bright green to duller bottle green colour. Its crystal habit is acicular, it is most likely to be found along with the uranyl selenium mineral demesmaekerite, but derriksite is much rarer than demesmaekerite. It is named after Jean Marie Francois Joseph Derriks (1912–1992), geologist and administrator of the Union Minière du Haut Katanga (UMHK). It has a Mohs hardness of about 2.[1]
References
- ↑ "Derriksite". mindat.org. Retrieved January 11, 2013.
Further reading
- Verbeek, Th.; Pierrot, R. (1971). "La Derriksite Cu4(UO2)(SeO3)2•(H2O) une nouvelle espece minérale" (PDF). Bull. Soc. Fr. Mineral. Cristallogr. 94: 534–537.
- Ginderow, D.; Cesbron, F. (1983). "Structure de la derriksite, Cu4(UO2)(SeO3)2•(H2O)". Acta Crystallographica Section C. 39 (12): 1605. doi:10.1107/S0108270183009439.
- Frost, Ray; Jagannadha Reddy, B.; Dickfos, Marilla (2008). "An application of near infrared and mid-infrared spectroscopy to the study of uranyl selenite minerals: Derriksite, demesmaekerite, guilleminite and haynesite". Journal of Near Infrared Spectroscopy. 16: 455. Bibcode:2008JNIS...16..455F. doi:10.1255/jnirs.813.
This article is issued from Wikipedia - version of the 11/18/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.