Nadorite

3+1⁄2 - 4LusterAdamantine, ResinousStreakWhite, yellow to yellowish whiteDiaphaneityTranslucentDensity7Refractive indexnα = 2.300 nβ = 2.340 - 2.350 nγ = 2.360 - 2.400Birefringenceδ = 0.060 - 0.100DispersionStrongAlters toTo cerussiteReferences[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

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ a b c d e "Nadorite". Mindat.org. Retrieved 2008-04-16.
  3. ^ 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.


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