Tyuyamunite
Mineral Ca(UO2)2(VO4)2·5-8H2O
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.
About it
The calcium partner of carnotite, almost identical as yellow crusts on Colorado Plateau sandstones. Named for Tyuya-Muyun in Kyrgyzstan; radioactive.
- Type
- Mineral
- Group
- Vanadate, carnotite group (uranyl)
- Formula
- Ca(UO2)2(VO4)2·5-8H2O
- Hardness (Mohs)
- 1.5–2
- Specific gravity
- 3.7–4.3
- Streak
- yellow
- Lustre
- earthy, pearly, waxy
- Crystal system
- Orthorhombic
- Colours
- canary yellow, greenish yellow
- Transparency
- translucent, opaque
- Cleavage and fracture
- perfect in one direction
- Under UV light
- weak yellow-green under UV, if any
Typical values: real specimens vary. For more, see mindat.org.