| Nadorite | |
| Category: | Halide mineral |
| Formula: | PbSbO2Cl |
| Imasymbol: | Nad[1] |
| Strunz: | 3.DC.30 |
| System: | Orthorhombic |
| Class: | Dipyramidal (mmm) H-M Symbol: (2/m 2/m 2/m) |
| Symmetry: | Bmmb |
| Color: | Brown, brownish-yellow, yellow |
| Twinning: | On, nearly perpendicular (91°45'), common |
| Cleavage: | On, perfect |
| Fracture: | Uneven |
| Mohs: | - 4 |
| Luster: | Adamantine, Resinous |
| Refractive: | 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 |
| Alteration: | To cerussite |
| References: | [2] |
Nadorite is a mineral with the chemical formula PbSbO2Cl.[3] It crystallizes in the orthorhombic crystal system and is brown, brownish-yellow or yellow in color, with a white or yellowish-white streak.
Nadorite is named after Djebel Nador in Algeria, where it was first identified in 1870.
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.