Native tungsten
| Tungsten | |
|---|---|
| General | |
| Category | Native element minerals |
| Formula (repeating unit) | W |
| Strunz classification | 1.AE.05 |
| Crystal system | Isometric |
| Crystal class |
Hexoctahedral (m3m) H-M symbol: (4/m 3 2/m) |
| Space group | Im3m |
| Unit cell | a = 3.165 Å; Z = 2 |
| Identification | |
| Color | Grey |
| Mohs scale hardness | 7.5 |
| Luster | Metallic |
| Diaphaneity | Opaque |
| References | [1][2] |
Native tungsten is the mineral form of the metal tungsten, with the accepted name simply tungsten. In its pure metallic form, natural tungsten is very rarely encountered and quite exotic.[3][4][5] Nanocrystals no bigger than 2 μm of native tungsten were identified in the lunar soil at the Luna 24 landing site Mare Crisium.[3][6]
References
- ↑ Mindat
- ↑ Mineralienatlas
- 1 2 "Tungsten: Tungsten mineral information and data". Mindat.org. 2016-02-26. Retrieved 2016-03-02.
- ↑ Glavatskikh, S.F., and Trubkin, N.V., 2000. First findings of native tungsten and silver in exhalation products of the Tolbachik Great Fissure Eruption, Kamchatka. Doklady Earth Sciences 373A(6), 997-999
- ↑ Kvasnytsya, V.M., Pavliuk, O.V., Kvasnytsya, I.V., and Gurmenko, I.V., 2014. The finding of native tungsten microcrystals in Bilokorovychi proterozoic conglomerates of the Volyn. Dopovidy Natsionalnoi Akademii Nauk Ukrainy 11, 88-94
- ↑ "File:Native tungsten Luna 24 landing site.jpg - Wikiversity". en.wikiversity.org. Retrieved 2016-10-31.
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