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Clausthalite

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Formula:
PbSe
System:
Isometric
Colour:
Bluish grey to lead-grey
Hardness:
2½ - 3
Member of:
Name:
After the discovery locality: Clausthal-Zellerfeld, Harz Mountains, Germany.

Classification of Clausthalite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
2.CD.10

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
D : With Sn, Pb, Hg, etc.
2.8.1.2

2 : SULFIDES
8 : AmXp, with m:p = 1:1
3.6.6

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
6 : Sulphides etc. of Sb and Pb
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First Recorded Occurrence of Clausthalite

Year of Discovery:
1832

Occurrences of Clausthalite

Geological Setting:
Selenium bearing low sulfur hydrothermal deposits.

Physical Properties of Clausthalite

Metallic
Diaphaneity (Transparency):
Opaque
Colour:
Bluish grey to lead-grey
Streak:
Grey-black
Hardness (Mohs):
2½ - 3
Hardness (Vickers):
VHN100=44 - 49 kg/mm2
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {001}
Fracture:
Irregular/Uneven
Comment:
Granular fracture
Density:
7.8 - 8.22 g/cm3 (Measured)    8.275 g/cm3 (Calculated)

Crystallography of Clausthalite

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Space Group Setting:
Fm3m
Cell Parameters:
a = 6.1243Å
Unit Cell Volume:
V 229.70 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Massive, fine granular, foliated

Chemical Properties of Clausthalite

Formula:
PbSe
Essential elements:
All elements listed in formula:
Common Impurities:
Hg,Co,Cu

Relationship of Clausthalite to other Species

Series:
Forms a series with Galena (see here)
Member of:
Other Members of Group:
AlabanditeMnS
AltaitePbTe
GalenaPbS
Niningerite(Mg,Fe2+,Mn2+)S
Oldhamite(Ca,Mg)S
2.CD.05Herzenbergite(Sn,Pb)SnS2
2.CD.05Teallite(Pb,Sn)SnS2
2.CD.10AlabanditeMnS
2.CD.10AltaitePbTe
2.CD.10GalenaPbS
2.CD.10Niningerite(Mg,Fe2+,Mn2+)S
2.CD.10Oldhamite(Ca,Mg)S
2.CD.10Keilite(Fe2+,Mg)S
2.CD.15aCinnabarHgS
2.CD.15bHypercinnabarHgS
3.6.1Herzenbergite(Sn,Pb)SnS2
3.6.2Ottemannitebeta Sn2S3
3.6.3BerndtiteSnS2
3.6.4StistaiteSnSb
3.6.5GalenaPbS
3.6.7AltaitePbTe
3.6.8Furutobeite(Cu,Ag)6PbS4
3.6.9AschamalmitePb6Bi2S9
3.6.10Betekhtinite(Cu,Fe)21Pb2S15
3.6.11Shadlunite(Pb,Cd)(Fe,Cu)8S8

Other Names for Clausthalite

Name in Other Languages:
Simplified Chinese:硒铅矿
Spanish:Clausthalita

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Clausthalite

Reference List:
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 204-205.

American Mineralogist (1950): 35: 337-364.

American Mineralogist (1959): 44: 166.

Internet Links for Clausthalite

Localities for Clausthalite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Mineral and/or Locality  
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