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Cameronite

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Eugene N. Cameron
Formula:
Cu5-x(Cu,Ag)3+xTe10 (x = 0.43)
Originally assumed to be Cu7AgTe10.
Colour:
Gray
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
7.144 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Eugene N. Cameron (10 August 1910, in Atlanta, Georgia, USA - 21 April 1999, Madison, Wisconsin, USA), professor at the University of Wisconsin, USA who first recognized it. Early in his career he worked for the U.S. Geological Survey. He was an expert on pegmatites and studied lunar samples.
This page provides mineralogical data about Cameronite.


Classification of Cameronite

Approved
First Published:
1986
2.DB.35

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
B : M:S = 2:3
2.16.20.1

2 : SULFIDES
16 : Miscellaneous
3.2.14

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
2 : Sulphides etc. of Ag

Physical Properties of Cameronite

Metallic
Transparency:
Opaque
Colour:
Gray
Streak:
Black
Hardness:
3½ - 4 on Mohs scale
Hardness:
VHN100=151 - 172 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Sub-Conchoidal
Density:
7.144 g/cm3 (Calculated)

Optical Data of Cameronite

Type:
Anisotropic
Anisotropism:
Distinct, medium gray to slate-gray to brownish gray
Pleochroism:
Weak
Comments:
Pale gray to pale brownish gray

Chemical Properties of Cameronite

Formula:
Cu5-x(Cu,Ag)3+xTe10 (x = 0.43)

Originally assumed to be Cu7AgTe10.
IMA Formula:
Cu5-x(Cu,Ag)3+xTe10 (x = 0.43)

Crystallography of Cameronite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C1 2/c 1
Cell Parameters:
a = 17.906(1) Å, b = 17.927(1) Å, c = 21.230(2) Å
β = 98.081(8)°
Ratio:
a:b:c = 0.999 : 1 : 1.184
Unit Cell V:
6747.2 ų
Z:
16
Morphology:
Anhedral grains to 200 microns.

Comment:
Originally assumed to be tetragonal, a = 12.695, c = 42.186 A.

Type Occurrence of Cameronite

Place of Conservation of Type Material:
British Natural History Museum
Geological Setting of Type Material:
Hydrothermal tellurium bearing veins.
Associated Minerals at Type Locality:

Synonyms of Cameronite

Other Language Names for Cameronite

German:Cameronit
Spanish:Cameronita

Related Minerals - Nickel-Strunz Grouping

2.DB.05AntimonseliteSb2Se3
2.DB.05BismuthiniteBi2S3
2.DB.05GuanajuatiteBi2Se3
2.DB.05MetastibniteSb2S3
2.DB.05PääkköneniteSb2AsS2
2.DB.05StibniteSb2S3
2.DB.10Ottemannitebeta Sn2S3
2.DB.10SuredaitePbSnS3
2.DB.15Bowieite(Rh,Ir,Pt)2S3
2.DB.15Kashinite(Ir,Rh)2S3
2.DB.20Montbrayite(Au,Sb)2Te3
2.DB.25EdgariteFeNb3S6
2.DB.30Tarkianite(Cu,Fe)(Re,Mo)4S8

Related Minerals - Hey's Chemical Index of Minerals Grouping

3.2.1AcanthiteAg2S
3.2.3NaumanniteAg2Se
3.2.4AguilariteAg4SeS
3.2.5HessiteAg2Te
3.2.6EmpressiteAgTe
3.2.7StütziteAg5-xTe3, x = 0.24-0.36
3.2.8CervelleiteAg4TeS
3.2.9DervilliteAg2AsS2
3.2.10StromeyeriteAgCuS
3.2.11MckinstryiteAg5-xCu3+xS4
3.2.12JalpaiteAg3CuS2
3.2.13EucairiteAgCuSe
3.2.15Henryite(Cu,Ag)3+xTe2 , with x ~ 0.40
3.2.16SternbergiteAgFe2S3
3.2.17ArgentopyriteAgFe2S3
3.2.18Geffroyite(Cu,Fe,Ag)9(Se,S)8
3.2.19ArgentopentlanditeAg(Fe,Ni)8S8

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 Cameronite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Roberts, A.C., Harris, D.C., Criddle, A.J., Pinch, W.W. (1986) Cameronite, a new copper-silver telluride from the Good Hope Mine, Vulcan, Colorado. The Canadian Mineralogist: 24: 379-384.
Bindi, L., Pinch, W.W. (2014) Cameronite, Cu5−x(Cu,Ag)3+xTe10 (x = 0.43), from the Good Hope Mine, Vulcan, Colorado: Crystal structure and revision of the chemical formula. Canadian Mineralogist: 52: 423-432.

Internet Links for Cameronite

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Localities for Cameronite

This 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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
USA (TL)
 
  • Colorado
    • Gunnison Co.
      • Vulcan District (Cebolla District; Domingo District)
        • Vulcan
Canadian Mineralogist(1986) 24, 379-384; "Minerals of Colorado, updated & revised", pp. 127-128 , by Eckel, Edwin B., 1997; Bindi L. & Pinch, W.W. (2014): Cameronite, Cu5−x(Cu,Ag)3+xTe10 (x = 0.43), from the Good Hope Mine, Vulcan, Colorado: Crystal structure and revision of the chemical formula. Canadian Mineralogist, 52, 423-432.
Mineral and/or Locality  
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