Mineralogy Database

Goldfieldite Mineral Data

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General Goldfieldite Information

Help on Chemical  Formula: Chemical Formula: Cu12(Te,Sb,As)4S13
Help on Composition: Composition: Molecular Weight = 1,665.23 gm
   Copper     45.79 %  Cu
   Antimony    4.39 %  Sb
   Tellurium  22.99 %  Te
   Arsenic     1.80 %  As
   Sulfur     25.03 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Cu12Te3Sb0.6As0.4S13
Help on Environment: Environment: Occures in epithermal precious metal veins.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1909
Help on Locality: Locality: Mohawk mine, Goldfield, Esmeralda County., Nevada, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Goldfieldite + Pronunciation Say GOLDFIELDITE
Help on Synonym: Synonym: ICSD 83000
  PDF 29-531
 

Goldfieldite Image

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  Goldfieldite

Comments: Back granular goldfieldite in white quartz.
Location: Mohawk Mine, Goldfield, Esmeralda County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Goldfieldite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.304, Z = 2; V = 1,094.00 Den(Calc)= 5.05
Help on Crystal System: Crystal System: Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: I 43m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.97(1), 1.82(0.6), 1.55(0.3),3.64(0.3), 2.43(0.2), 2.58(0.2), 2.77(0.1),
 

Physical Properties of Goldfieldite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark lead gray, Iron black.
Help on Density: Density: 4.95
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 3-3.5 - Calcite-Copper Penny
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: black
 

Optical Properties of Goldfieldite

Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Goldfieldite in Air
λ R  ∑ R(λ) 
 400 nm   31.10   
 420 nm   30.80 
 440 nm   30.50 
 460 nm   30.50 
 480 nm   30.20 
 500 nm   30.10 
 520 nm   30.10 
 540 nm   30.10 
 560 nm   30.20 
 580 nm   30.20 
 600 nm   30.30 
 620 nm   30.50 
 640 nm   30.80 
 660 nm   30.90 
 680 nm   31.00 
 700 nm   31.10 
Calculated Relative Intensity Colors of Goldfieldite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270% 290%
R                        
 

Calculated Properties of Goldfieldite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.58 gm/cc
note: Specific Gravity of Goldfieldite =5.05 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEGoldfieldite = 115.82 barns/electron
U=PEGoldfieldite x rElectron Density= 530.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Goldfieldite is Not Radioactive
 

Goldfieldite Classification

Help on  Dana Class: Dana Class: 03.03.06.06 (03)Sulfides - Sulfosalts
  (03.03)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.03.06)Tetrahedrite Group (Isometric: I-43m)
 
03.03.06.01 Tetrahedrite (Cu,Fe)12Sb4S13 I 43m 4 3m
 
03.03.06.02 Tennantite (Cu,Fe)12As4S13 I 43m 4 3m
 
03.03.06.03 Freibergite (Ag,Cu,Fe)12(Sb,As)4S13 I 43m 4 3m
 
03.03.06.04 Hakite (Cu,Hg)3(Sb,As)(Se,S)3 I 43m 4 3m
 
03.03.06.05 Giraudite (Cu,Zn,Ag)12(As,Sb)4(Se,S)13 I 43m 4 3m
 
03.03.06.06 Goldfieldite Cu12(Te,Sb,As)4S13 I 43m 4 3m
 
03.03.06.07 Argentotennantite (Ag,Cu)10(Zn,Fe)2(As,Sb)4S13 I 43m 4 3m
Help on  Strunz Class: Strunz Class: 02.GB.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.G - Sulfarsenites, sulfantimonites, sulfbismuthites
  02.GB -Neso-sulfarsenites, etc
 
02.GB.05 Argentotennantite (Ag,Cu)10(Zn,Fe)2(As,Sb)4S13 I 43m 4 3m
 
02.GB.05 Giraudite (Cu,Zn,Ag)12(As,Sb)4(Se,S)13 I 43m 4 3m
 
02.GB.05 Goldfieldite Cu12(Te,Sb,As)4S13 I 43m 4 3m
 
02.GB.05 Freibergite (Ag,Cu,Fe)12(Sb,As)4S13 I 43m 4 3m
 
02.GB.05 Hakite (Cu,Hg)3(Sb,As)(Se,S)3 I 43m 4 3m
 
02.GB.05 Tennantite (Cu,Fe)12As4S13 I 43m 4 3m
 
02.GB.05 Tetrahedrite (Cu,Fe)12Sb4S13 I 43m 4 3m
 

Other Goldfieldite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Goldfieldite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Goldfieldite

Cu12(Te,Sb,As)4S13
Dana No: 03.03.06.06 Strunz No: 02.GB.05
Locality:

 

Notes:

 

 
   
 


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