Cuprosklodowskite
Mineral Cu(UO2)2(SiO3OH)2·6H2O
Take care.
- Radioactive: Keep it in a closed, labelled box away from where people sit or sleep, handle it briefly, wash your hands after, and never grind or cut it.
About it
Bright grass- to emerald-green needles and sprays, a copper uranyl silicate from oxidized uranium-copper ores; the finest come from Musonoi and Kalongwe in Katanga, Congo.
- Type
- Mineral
- Group
- Silicate (nesosilicate), uranophane group
- Formula
- Cu(UO2)2(SiO3OH)2·6H2O
- Specific gravity
- 3.8–3.9
- Lustre
- vitreous (glassy), silky
- Crystal system
- Triclinic
- Colours
- emerald green, grass green, yellowish green
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect in one direction
Typical values: real specimens vary. For more, see mindat.org.