Metazeunerite
Mineral Cu(UO2)2(AsO4)2·8H2O
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.
- Contains arsenic: Wash your hands after handling it, don't make dust, and never heat it.
About it
The lower-water form of zeunerite and the commoner of the two in collections: green square plates with both uranium and arsenic. Found in oxidized uranium-arsenic veins in Germany, the Czech Republic, and Cornwall.
- Type
- Mineral
- Group
- Arsenate, meta-autunite group (uranyl)
- Formula
- Cu(UO2)2(AsO4)2·8H2O
- Hardness (Mohs)
- 2–2.5
- Streak
- pale green
- Lustre
- vitreous (glassy), pearly
- Crystal system
- Tetragonal
- Colours
- emerald green, grass green
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect in one direction
Typical values: real specimens vary. For more, see mindat.org.