Nadorite | |
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General | |
Category | Halide mineral |
Formula (repeating unit) | PbSbO2Cl |
IMA symbol | Nad[1] |
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 |
Luster | 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]