Clausthalite

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

Clausthalite
General
CategorySelenide mineral
Formula
(repeating unit)		PbSe
Strunz classification2.CD.10
Dana classification02.08.01.02
Crystal systemIsometric
Crystal classHexoctahedral (m3m)
H-M symbol: (4/m 3 2/m)
Space groupFm3m
Identification
ColorBluish gray to lead-gray
Crystal habitMassive to granular with euhedral crystals
Cleavage{001} Perfect, {010} Perfect, {100} Perfect
Mohs scale hardness2.5
LusterMetallic
Streakgrayish black
Diaphaneityopaque
Specific gravity7.6 - 8.8
References[1][2][3][4]

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]

gollark: How I hate dynamic libraries.
gollark: I ran a broken program in `gdb` and this happened?```Program received signal SIGSEGV, Segmentation fault.0x00007ffff7fde4c1 in _dl_relocate_object () from /lib64/ld-linux-x86-64.so.2```
gollark: So I got one reply on r/archlinux about my weird issue, and it turned out to not be very helpful.
gollark: Can't see anything obvious about Qt there.
gollark: I should probably ask on r/archlinux or something.

See also

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