Nadorite
| Nadorite | ||
|---|---|---|
Mohs scale hardness 3+1⁄2 - 4 | | |
| Luster | Adamantine, Resinous | |
| Streak | White, yellow to yellowish white | |
| Diaphaneity | Translucent | |
| Density | 7 | |
| Refractive index | nα = 2.300 nβ = 2.340 - 2.350 nγ = 2.360 - 2.400 | |
| Birefringence | δ = 0.060 - 0.100 | |
| Dispersion | Strong | |
| Alters to | To cerussite | |
| References | [2][3] | |
Nadorite is a
orthorhombic crystal system and is brown, brownish-yellow or yellow in color, with a white or yellowish-white streak.[2]
Nadorite is named after Djebel Nador in Algeria, where it was first identified in 1870.[2]
Geologic occurrence
Djebel Nador and Djebel Debbar (both in the Constantine Province of Algeria) are its co-type localities. Also found as an alteration product of jamesonite in Cornwall, England.[2]
References
- S2CID 235729616.
- ^ a b c d e "Nadorite". Mindat.org. Retrieved 2008-04-16.
- ^ Nadorite data at Webmineral
Bibliography
- Palache, P.; Berman H.; Frondel, C. (1960). "Dana's System of Mineralogy, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. (Seventh Edition)" John Wiley and Sons, Inc., New York, pp. 1039-1041.