Nadorite
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| Nadorite | |
|---|---|
| Category | Lead minerals, Antimonate minerals, Halide minerals |
| Chemical formula | PbSb[O2|Cl] |
| Identification | |
| Color | Brown, brownish-yellow, yellow |
| Crystal system | Orthorhombic |
| Twinning | On {101}, nearly perpendicular (91°45'), common |
| Cleavage | On {010}, perfect |
| Fracture | Uneven |
| Mohs Scale hardness | 3½ - 4 |
| Luster | Adamantine, Resinous |
| Refractive index | nα = 2.300 nβ = 2.340 - 2.350 nγ = 2.360 - 2.400 |
| Birefringence | δ = 0.060 - 0.100 |
| Dispersion | Strong |
| Streak | White, yellow to yellowish white |
| Density | 7 |
| Diaphaneity | Translucent |
Nadorite is a mineral with the chemical formula PbSb[O2|Cl].[1]
In the orthorhombic crystal system, Nadorite is brown, brownish-yellow or yellow in colour, with a white or yellowish-white streak.[1]
With a Mohs hardness of 3½ to 4, it has one perfect cleavage.[1]
Nadorite is named after Djebel Nador in Algeria, where it was first identified in 1870.[1] Djebel Nador and Djebel Debbar (both in the Constantine Province of Algeria) are its co-type localities.[1]
[edit] References
- Nadorite data at Webmineral
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