Liebigite
Mineral Ca2(UO2)(CO3)3·11H2O
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
Apple-green to yellow-green crusts and small crystals that glow green under UV, often on the walls of old uranium mines. Radioactive; named for chemist Justus von Liebig, and known from Jáchymov, Czechia.
- Type
- Mineral
- Group
- Carbonate (uranyl carbonate)
- Formula
- Ca2(UO2)(CO3)3·11H2O
- Hardness (Mohs)
- 2.5–3
- Specific gravity
- 2.41
- Streak
- yellowish white
- Lustre
- vitreous (glassy), pearly
- Crystal system
- Orthorhombic
- Colours
- apple green, yellow-green, green
- Transparency
- transparent, translucent
- Cleavage and fracture
- distinct in one direction
- Under UV light
- bright green under UV
Typical values: real specimens vary. For more, see mindat.org.