Tyuyamunit is a radioactive mineral of the group of uranium mica . It is a calcium analogue of carnotite . It is described by K. A. Nenadkenich in 1912 , as a new mineral from the Tyuya-Muyun deposit ( Kyrgyzstan ).
| Tuyamunit | |
|---|---|
 | |
| Formula | Ca [UO 2 ] [V 2 O 8 ] x 8H 2 O |
| Physical properties | |
| Colour | canary yellow, lemon yellow, greenish yellow |
| Color features | yellow |
| Shine | diamond, waxy, pearly, dull |
| Transparency | translucent, opaque |
| Hardness | 1.5—2 |
| Cleavage | very perfect in {001}, mica-like; clear by {100} and {010} |
| Kink | mica-like |
| Density | 3.57-4.35 g / cm³ |
| Syngony | Rhombic , orthorhombic |
Content
Description
The crystalline structure is layered. Syngonia is rhombic. Cleavage is perfect. The appearance is lamellar. Color is yellow with an orange-yellow or greenish tint. Gloss mother-of-pearl or glass. It occurs in the form of scales, or in the form of powder clusters. The break is mica-like.
Location
It occurs in sedimentary rocks when exposed to bicarbonate water on carnotite.
Literature
- Nenadkevich K. A. Results of a study of the Tyuya-Muyun uranium and vanadium mine in the Ferghana region // Notes of St. Petersburg. Mineralogical Society. 1909. Ser. 2. Part 47. Protocols. S. 839.
- Nenadkevich K. A. Tuyamunit - a new mineral species // Proceedings of the Imperial Academy of Sciences. 1912. Ser. 6. No. 15. P. 945–946.
- Nenadkevich K.A., Volchkov P.A. On a new mineral - Tangeit from Tuyamuyun // Dokl. Academy of Sciences of the USSR. Ser. A. 1926. March. C. 43-46.
Links
- [1] Tuyamunit at Geowiki