Mineralpedia Details for Dewindtite
Dewindtite
Named to honor Belgian geologist Dr. Jean Dewindt. A rare secondary mineral that occurs via the alteration of uraninite or earlier-formed uranium minerals. Localities for Dewindtite are found in the Democratic Republic of the Congo, Germany, France, the Czech Republic, Portugal, Canada, and Australia, among several others. Dewindtite is highly radioactive, and will fluoresce green under ultraviolet light.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/dewindtite.pdf
- Formula
- H2Pb3(UO2)6O4(PO4)4ยท12H2O
- Crystal System
- Orthorhombic
- Crystal Habit
- Tabular, Striated, Pulverulent
- Cleavage
- Perfect, None, None
- Color
- greenish yellow, yellow, light yellow
- Streak
- light yellow
- Class
- Orthorhombic - Dipyramidal
- Fracture
- Brittle
- Hardness
- 2.5-3
- WebMineral
- View Dewindtite
- Mindat
- View Dewindtite
Dewindtite from Grury, Issy-l'Eveque, Saone-et-Loire, Burgundy, France
Canary yellow, minute, acicular crystals to less than 0.5mm virtually covering the entire are of yellow in the photos.
Click thumbnail images for larger view.
