Mineralpedia Details for Dickite
Dickite
Named for Scottish metallurgical chemist Allan Brugh Dick, who was the first to describe the species. Dickite is relatively common and widespread with well studied material from localities in Wales, Hungary, France, South Africa, the United States, and Mexico, along with many other localities. It occurs typically of hydrothermal origin in veins that were derived in part from altered aluminosilicate minerals and can additionally be found as an authigenic mineral in sediments and sedimentary rocks. Dickite is associated with quartz and quartz variety chalcedony.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/dickite.pdf
- Formula
- Al2Si2O5(OH)4
- Crystal System
- Monoclinic
- Crystal Habit
- Earthy
- Cleavage
- Perfect, None, None
- Luster
- Pearly
- Color
- blue, colorless, gray, yellow brown, white
- Streak
- white
- Class
- Monoclinic - Domatic
- Fracture
- Earthy
- Hardness
- 1.5-2
- WebMineral
- View Dickite
- Mindat
- View Dickite
Dickite from Lodev Uranium mine, Lodev, Haute Vienne, France
Pearly white, thin platy crystals to 2mm.
Dickite from Raberjac mine, Lodève, Hérault, France
Pearly white, thin, platy crystals in rosettes to 2mm. Excellent crystals.
