Nadorite Explained

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.

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.

Bibliography

Notes and References

  1. Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3 . 291–320. 10.1180/mgm.2021.43 . 2021MinM...85..291W . 235729616 . free.
  2. http://www.webmineral.com/data/Nadorite.shtml Nadorite data at Webmineral
  3. Web site: Nadorite. Mindat.org. 2008-04-16.