Nadorite
3+1⁄2 - 4Luster 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 mineral with the chemical formula PbSbO2Cl.[2] It crystallizes in the 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
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.
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