Clausthalite

Clausthalite
General
Category Selenide mineral
Formula
(repeating unit)		 PbSe
Strunz classification 2.CD.10
Dana classification 02.08.01.02
Crystal system Isometric
Crystal class Hexoctahedral (m3m)
H-M symbol: (4/m 3 2/m)
Space group Fm3m
Identification
Color Bluish gray to lead-gray
Crystal habit Massive to granular with euhedral crystals
Cleavage {001} Perfect, {010} Perfect, {100} Perfect
Mohs scale hardness 2.5
Luster Metallic
Streak grayish black
Diaphaneity opaque
Specific gravity 7.6 - 8.8
References [1][2][3][4]

Clausthalite is a lead selenide mineral, PbSe. It forms a solid solution series with galena PbS.

Occurrence

It occurs in low-sulfur hydrothermal deposits with other selenides and in mercury deposits. It is associated with tiemannite, klockmannite, berzelianite, umangite, gold, stibiopalladinite and uraninite.[2]

It was first described in 1832 and named for the discovery locality of Clausthal-Zellerfeld in the Harz Mountains, Germany.[4]

See also

References

  1. ↑ Mineralienatlas
  2. 1 2 http://rruff.geo.arizona.edu/doclib/hom/clausthalite.pdf Handbook of Mineralogy
  3. ↑ http://webmineral.com/data/Clausthalite.shtml Webmineral data
  4. 1 2 http://www.mindat.org/min-1061.html Mindat
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