Chemistry:Nadorite
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| Nadorite | |
|---|---|
 | |
| General | |
| Category | Halide mineral |
| Formula (repeating unit) | PbSbO2Cl |
| Strunz classification | 3.DC.30 |
| Crystal system | Orthorhombic |
| Crystal class | Dipyramidal (mmm) H-M Symbol: (2/m 2/m 2/m) |
| Space group | Bmmb |
| Identification | |
| Color | Brown, brownish-yellow, yellow |
| Twinning | On {101}, nearly perpendicular (91°45'), common |
| Cleavage | On {010}, perfect |
| Fracture | Uneven |
| Mohs scale hardness | 3 1⁄2 - 4 |
| |re|er}} | 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 | [1][2] |
Nadorite is a mineral with the chemical formula PbSbO2Cl.[1] It crystallizes in the orthorhombic crystal system and is brown, brownish-yellow or yellow in color, with a white or yellowish-white streak.[1]
Nadorite is named after Djebel Nador in Algeria, where it was first identified in 1870.[1]
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 .[1]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "Nadorite". Mindat.org. http://www.mindat.org/min-2827.html. Retrieved 2008-04-16.
- ↑ Nadorite data at Webmineral
- ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
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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