Nadorite

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Nadorite
Nadorite.jpg
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 3½ - 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
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] Djebel Nador and Djebel Debbar (both in the Constantine Province of Algeria) are its co-type localities.[1]

References[edit]

  1. ^ a b c d e "Nadorite". Mindat.org. Retrieved 2008-04-16. 
  2. ^ Nadorite data at Webmineral