Tetrahedrite Mineral Data (original) (raw)
General Tetrahedrite Information
Chemical Formula:
(Cu,Fe)12Sb4S13
Composition:
Molecular Weight = 1,643.31 gm
Iron 10.20 % Fe
Copper 34.80 % Cu
Antimony 29.64 % Sb
Sulfur 25.37 % S
______
100.00 %
Empirical Formula:
Cu9Fe2+3Sb4S13
Environment:
Hydrothermal veins and contact metamorphic deposits of low to moderate temperature.
IMA Status:
Valid Species (Pre-IMA) 1845
Locality:
Freiberg, Saxony, Germany. Link to MinDat.org Location Data.
Name Origin:
Name is derived from its crystal form.
Name Pronunciation:
Tetrahedrite + Pronunciation 
Synonym:
ICSD 62116
PDF 42-561
Tetrahedrite Image
Images:
 |
Tetrahedrite Comments: A very brilliant tetrahedrite group with the tops of the crystals covered in chalcopyrite. Location: Casapalca, Lima, Peru.Scale: 8 x 6 cm. © Fabre Minerals |
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Images:
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Tetrahedrite Comments: Bright sharp metallic tetrahedrite crystals to 1 cm in size on pinkish to colorless crystalline calcite matrix. Location: Cavnic (Kapnik), Maramures, Romania.Scale: 14 x 11 x 3 cm. © Dan Weinrich |
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Tetrahedrite Crystallography
Cell Dimensions:
a = 10.33, Z = 2; V = 1,102.30 Den(Calc)= 4.95
Crystal System:
Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: I 43m
X Ray Diffraction:
By Intensity(I/Io): 3(1), 1.831(0.6), 1.563(0.3),
Forms:
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| | Forms:( 2 1 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ------------------------------------------------------------------------------------------------------------------------- |
Crystal Structure:
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| | Johnson M L , Burnham C W , American Mineralogist , 70 (1985) p.165-170, Crystal structure refinement of an arsenic-bearing argentian tetrahedrite View Additional jPOWD Structure files for Tetrahedrite [1] [2] [3] [4] [5] [6] [7] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Tetrahedrite
Cleavage:
None
Color:
Iron gray, Black, Steel gray.
Density:
4.6 - 5.2, Average = 4.9
Diaphaneity:
Opaque
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Habit:
Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
3.5-4 - Copper Penny-Fluorite
Luminescence:
Non-fluorescent.
Luster:
Metallic
Magnetism:
Nonmagnetic
Streak:
black
Optical Properties of Tetrahedrite
Optical Data:
Isotropic, n=2.72.
RL Color:
Gray inclining to olive-brown.
RL Pleochroism:
None.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Tetrahedrite in Air
| λ | R |  |
∑ R(λ) |
|---|---|---|---|
| 400 nm | 30.30 |  |
|
| 420 nm | 30.90 |  |
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| 440 nm | 31.50 |  |
|
| 460 nm | 31.80 |  |
|
| 480 nm | 31.80 |  |
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| 500 nm | 32.00 |  |
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| 520 nm | 32.40 |  |
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| 540 nm | 32.80 |  |
|
| 560 nm | 33.00 |  |
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| 580 nm | 33.00 |  |
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| 600 nm | 32.50 |  |
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| 620 nm | 31.60 |  |
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| 640 nm | 31.00 |  |
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| 660 nm | 30.80 |  |
|
| 680 nm | 30.60 |  |
|
| 700 nm | 30.40 |  |
Calculated Relative Intensity Colors of Tetrahedrite in Air
| RelativeIntensity | 0% | 30% | 60% | 90% | 100% | 120% | 150% | 180% | 210% | 240% | 270% | 280% |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| R |
Calculated Properties of Tetrahedrite
Electron Density:
Bulk Density (Electron Density)=4.52 gm/cc
note: Specific Gravity of Tetrahedrite =4.95 gm/cc.
Fermion Index:
Fermion Index = 0.0040639271
Boson Index = 0.9959360729
Photoelectric:
PETetrahedrite = 116.02 barns/electron
U=PETetrahedrite x rElectron Density= 524.91 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tetrahedrite is Not Radioactive
Tetrahedrite Classification
Dana Class:
03.03.06.01 (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
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 Tetrahedrite Information
References:
NAME( ODonoghue90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
See Also:
Links to other databases for Tetrahedrite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - HyperPhysics
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info
18 - Scandinavian mineral gallery
19 - WWW-MINCRYST
20 - YupRocks
21 - theimage
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Print or Cut-and-Paste your Tetrahedrite Specimen Label here :
Tetrahedrite
(Cu,Fe)12Sb4S13
Dana No: 03.03.06.01 Strunz No: 02.GB.05
Locality:
Notes: