Bayleyite
Mineral Mg2(UO2)(CO3)3·18H2O
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
Sulphur-yellow, short prismatic crystals and crusts that form on the walls of uranium mines and lose water easily. Radioactive; first found at the Hillside mine, Arizona.
- Type
- Mineral
- Group
- Carbonate (uranyl carbonate)
- Formula
- Mg2(UO2)(CO3)3·18H2O
- Hardness (Mohs)
- 2–2.5
- Specific gravity
- 2.05
- Streak
- white
- Lustre
- vitreous (glassy), dull
- Crystal system
- Monoclinic
- Colours
- sulphur yellow, pale yellow
- Transparency
- transparent, translucent
- Cleavage and fracture
- none
- Under UV light
- weak yellow to yellow-green under UV
Typical values: real specimens vary. For more, see mindat.org.