Tennantite Mineral Data + Say TENNANTITE


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General Tennantite Information
Help on Chemical Formula: Chemical Formula: (Cu,Fe)12As4S13
Help on Composition: Composition: Molecular Weight = 1,471.40 gm
   Iron      3.80 %  Fe
   Copper   47.51 %  Cu
   Arsenic  20.37 %  As
   Sulfur   28.33 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu11Fe2+As4S13
Help on Environment: Environment: Hydrothermal veins and contact metamorphic deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1819
Help on Locality: Locality: Cornwall, England, UK. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the English chemist, Smithson Tennant (1761-1815).
Help on Synonym: Synonym: Binnite
  ICSD 26780
  Julianite
  PDF 43-1478
 

Tennantite Image

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Tennantite   Calcio-andyrobertsite-1M

Comments: Vein of blue calcioandyrobertsite in massive dark gray tennantite. The vein of calcioandyrobertsite extends for 0.8cm.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Specimen size 1.1 x 0.5 cm.
© John Veevaert
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Tennantite

Comments: Crystals of dark gray tennantite on white quartz.
Location: Concepcion del Oro, Zacatecas, Mexico. Scale: 6 x 5.5 cm.
© Fabre Minerals
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Tennantite   Schaurteite

Comments: Bright white silky fibrous schaurteite on dark tennantite.
Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Tennantite

Comments: Micro-quartz coated, dark gray tennantite on quartz. Former Sussman Tsumeb specimen.
Location: Tsumeb, Namibia. Scale: Crystal size 5 cm.
© John Schneider

Tennantite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 10.186, Z = 2; V = 1,056.84 Den(Calc)= 4.62
Help on Crystal System: Crystal System: Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: I 43m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.94(1), 1.801(0.8), 1.535(0.5),
Help on Forms: Forms:

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Forms: [ 2 1 1] [ 1 0 0] [ 1 1 0]

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Makovicky E , Karanovic L , Poleti D , Balic-Zunic T , Paar W H , The Canadian Mineralogist , 43 (2005) p.679-688, Crystal structure of copper-rich unsubstituted tennantite, Cu12.5As4S13, Sample: Cerro Atajo, Catamarco, Argentina

View Additional jPOWD Structure files for Tennantite
[1] [2]
 

Physical Properties of Tennantite

Help on Cleavage: Cleavage: None
Help on Color: Color: Steel gray, Black.
Help on Density: Density: 4.6 - 4.7, Average = 4.65
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Hackly - Jagged, torn surfaces, (e.g. fractured metals).
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: reddish gray
 

Optical Properties of Tennantite

Help on Optical Data: Optical Data: Isotropic, n=2.72.
Help on RL Color: RL Color: Gray, inclining to black to brown to cherry-red.
Help on RL Pleochroism: RL Pleochroism: None.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Tennantite in Air
λ R  ∑ R(λ) 
 400 nm   31.40   
 420 nm   30.60 
 440 nm   29.80 
 460 nm   29.20 
 480 nm   29.00 
 500 nm   29.00 
 520 nm   28.80 
 540 nm   28.50 
 560 nm   28.00 
 580 nm   27.30 
 600 nm   26.40 
 620 nm   25.60 
 640 nm   24.80 
 660 nm   24.20 
 680 nm   23.80 
 700 nm   23.40 
Calculated Relative Intensity Colors of Tennantite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 340%
R                      
 

Calculated Properties of Tennantite

Help on Electron Density: Electron Density:

relectron=4.30 gm/cc
note: rTennantite =4.62 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00292
Boson Index = 0.99708
Help on Photoelectric: Photoelectric:

PETennantite = 38.34 barns/electron
U=PETennantite x relectron= 164.92 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tennantite is Not Radioactive
 

Tennantite Classification
Help on Dana Class: Dana Class: 3.3.6.2 (3)Sulfides - Sulfosalts
  (3.3)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.3.6)Tetrahedrite Group (Isometric: I4¯3m)
 
3.3.6.1 Tetrahedrite (Cu,Fe)12Sb4S13 I 43m 4 3m
 
3.3.6.2 Tennantite (Cu,Fe)12As4S13 I 43m 4 3m
 
3.3.6.3 Freibergite (Ag,Cu,Fe)12(Sb,As)4S13 I 43m 4 3m
 
3.3.6.4 Hakite (Cu,Hg)3(Sb,As)(Se,S)3 I 43m 4 3m
 
3.3.6.5 Giraudite (Cu,Zn,Ag)12(As,Sb)4(Se,S)13 I 43m 4 3m
 
3.3.6.6 Goldfieldite Cu12(Te,Sb,As)4S13 I 43m 4 3m
 
3.3.6.7 Argentotennantite (Ag,Cu)10(Zn,Fe)2(As,Sb)4S13 I 43m 4 3m
Help on Strunz Class: Strunz Class: II/C.11-10 II - Sulfides and sulphosalts
  II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1
  II/C.11 - Tetrahedrite group
 
II/C.11-10 Tennantite (Cu,Fe)12As4S13 I 43m 4 3m
 
II/C.11-20 Argentotennantite (Ag,Cu)10(Zn,Fe)2(As,Sb)4S13 I 43m 4 3m
 
II/C.11-30 Giraudite (Cu,Zn,Ag)12(As,Sb)4(Se,S)13 I 43m 4 3m
 
II/C.11-40 Tetrahedrite (Cu,Fe)12Sb4S13 I 43m 4 3m
 
II/C.11-50 Freibergite (Ag,Cu,Fe)12(Sb,As)4S13 I 43m 4 3m
 
II/C.11-60 Goldfieldite Cu12(Te,Sb,As)4S13 I 43m 4 3m
 
II/C.11-70 Hakite (Cu,Hg)3(Sb,As)(Se,S)3 I 43m 4 3m
 
II/C.11-75 Mgriite Cu3AsSe3 F d3m 4/m 3 2/m
 
II/C.11-80 Chameanite (Cu,Fe)4As(Se,S)4 I 43m 4 3m
 

Other Tennantite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Tennantite :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Applied Mineralogy 6 -Athena 7 - Crocoite.com Mineral Locations 8 - EUROmin Project 9 - Franklin Minerals(Dunn) 10 - Franklin Minerals(Palache) 11 -Google Images 12 -Google Scholar 13 -Handbook of Mineralogy (UofA) 14 - HyperPhysics 15 -MinDAT 16 -MinMax(Deutsch) 17 -MinMax(English) 18 -Mineralienatlas (Deutsch) 19 -QUT Mineral Atlas 20 - Scandinavian mineral gallery 21 - WWW-MINCRYST 22 -École des Mines de Paris

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Print or Cut-and-Paste your Tennantite Specimen Label here :

Tennantite

(Cu,Fe)12As4S13
Dana No: 3.3.6.2 Strunz No: II/C.11-10
Locality:

 

Notes:

 
 
   
 
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