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Cameronite

A valid IMA mineral species
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About CameroniteHide

08890930014947950607663.jpg
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.


Unique IdentifiersHide

Mindat ID:
873
Long-form identifier:
mindat:1:1:873:4
GUID
(UUID V4):
83037182-1118-421c-8e85-68896ceeb705

Classification of CameroniteHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
CmeIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of CameroniteHide

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 CameroniteHide

Anisotropism:
Distinct, medium gray to slate-gray to brownish gray.
Reflectivity:
WavelengthR1R2
400nm23.6%28.4%
420nm25.6%30.1%
440nm27.4%31.4%
460nm28.9%32.5%
480nm30.1%33.1%
500nm31.0%33.6%
520nm31.6%33.7%
540nm32.1%33.8%
560nm32.5%33.7%
580nm32.8%33.6%
600nm33.0%33.4%
620nm33.1%33.2%
640nm33.3%33.0%
660nm33.4%32.7%
680nm33.5%32.6%
700nm33.6%32.3%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 33.8%.
R1 shown in black, R2 shown in red
Pleochroism:
Weak
Comments:
Pale gray to pale brownish gray.

Chemical Properties of CameroniteHide

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 CameroniteHide

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.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0020464CameroniteBindi 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 The Canadian Mineralogist 52 423-4322014Good Hope mine, Vulcan, Colorado, USA0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.45 Å(100)
2.118 Å(100)
1.804 Å(60)
1.377 Å(40)
1.222 Å(40)
1.815 Å(30)
1.151 Å(30)
Comments:
Good Hope mine, Colorado, USA. Data from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of CameroniteHide

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 CameroniteHide

Other Language Names for CameroniteHide

German:Cameronit
Spanish:Cameronita

Related Minerals - Strunz-mindat GroupingHide

2.DB.StangersiteSnGeS3Mon. 2/m : P21/b
2.DB.05AntimonseliteSb2Se3Orth. mmm (2/m 2/m 2/m) : Pnma
2.DB.05BismuthiniteBi2S3Orth. mmm (2/m 2/m 2/m)
2.DB.05GuanajuatiteBi2Se3Orth. mmm (2/m 2/m 2/m) : Pnma
2.DB.05MetastibniteSb2S3Amor.
2.DB.05PääkköneniteSb2AsS2Mon. 2/m : B2/m
2.DB.05StibniteSb2S3Orth. mmm (2/m 2/m 2/m)
2.DB.10OttemanniteSn2S3Orth. mmm (2/m 2/m 2/m)
2.DB.10SuredaitePbSnS3Orth. mmm (2/m 2/m 2/m) : Pnma
2.DB.15BowieiteRh2S3Orth. mmm (2/m 2/m 2/m) : Pbcn
2.DB.15KashiniteIr2S3Orth. mmm (2/m 2/m 2/m) : Pbcn
2.DB.20Montbrayite(Au,Ag,Sb,Bi,Pb)23(Te,Sb,Bi,Pb)38Tric. 1 : P1
2.DB.25EdgariteFeNb3S6Hex. 6 : P63
2.DB.30Tarkianite(Cu,Fe)(Re,Mo)4S8Iso. 4 3m : F4 3m
2.DB.40Schreibersite (of Shephard)Cr2S3

Other InformationHide

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 CameroniteHide

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. The Canadian Mineralogist: 52: 423-432.

Internet Links for CameroniteHide

Localities for CameroniteHide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • Colorado
    • Gunnison County
      • Vulcan Mining District (Cebolla Mining District; Domingo Mining District)
        • Vulcan
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.; Eckel, Edwin B. (1997) Minerals of Colorado, updated & revised. 127-128.; 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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