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Famatinite Mineral Data
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General Famatinite Information
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 Chemical Formula: |
Cu3SbS4 |
| Composition: |
Molecular Weight = 440.65 gm |
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Copper 43.26 % Cu |
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Antimony 27.63 % Sb |
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Sulfur 29.11 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu3SbS4 |
| Environment: |
Antimony (Sb) analog of enargite (arsenic-As). |
| IMA Status: |
Valid Species (Pre-IMA) 1873 |
| Locality: |
Sierra de Famatina, La Rioja, Argentina. Link to MinDat.org Location Data. |
| Name Origin: |
Named after its locality. |
| Name Pronunciation: |
Famatinite + Pronunciation  |
| Synonym: |
ICSD 2857 |
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PDF 35-581 |
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Famatinite Image |
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Images:
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Images:
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Famatinite
Comments: Dark, purplish black, massive famatinite.
Location: Tertiary volcanic massif, the Serrania de Laurani, Bolivia.
Scale: Picture size 2 cm.
© Dave Barthelmy |
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Famatinite Crystallography
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| Axial Ratios: |
a:c = 1:1.99585 |
| Cell Dimensions: |
a = 5.3853, c = 10.7483, Z = 2; V = 311.72 Den(Calc)= 4.69 |
| Crystal System: |
Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.108(1), 1.902(0.65), 1.6233(0.35), |
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Physical Properties of Famatinite
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| Cleavage: |
{101} Good, {100} Distinct |
| Color: |
Grayish black, Dark pink brown, Steel gray. |
| Density: |
4.57 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
| Hardness: |
3-4 - Calcite-Fluorite |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Metallic |
| Magnetism: |
Nonmagnetic |
| Streak: |
black |
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Optical Properties of Famatinite
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| RL Anisotrophism: |
Strong, greenish yellow and purplish red. |
| RL Color: |
Pale brownish pink. |
| RL Pleochroism: |
Weak, light orange, pink-violet. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Famatinite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
24.40 |
30.00 |
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| 420 nm |
24.20 |
25.50 |
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| 440 nm |
24.00 |
25.00 |
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| 460 nm |
23.80 |
24.10 |
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| 480 nm |
23.10 |
23.40 |
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| 500 nm |
22.70 |
23.10 |
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| 520 nm |
22.90 |
23.60 |
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| 540 nm |
23.80 |
25.00 |
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| 560 nm |
24.30 |
26.00 |
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| 580 nm |
24.50 |
26.50 |
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| 600 nm |
24.80 |
27.00 |
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| 620 nm |
25.40 |
27.50 |
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| 640 nm |
26.00 |
28.10 |
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| 660 nm |
26.80 |
28.60 |
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| 680 nm |
27.30 |
29.00 |
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| 700 nm |
27.50 |
29.40 |
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Calculated Relative Intensity Colors of Famatinite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
360% |
370% |
| R1 |
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| R2 |
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Calculated Properties of Famatinite
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| Electron Density: |
Bulk Density (Electron Density)=4.30 gm/cc
note: Specific Gravity of Famatinite =4.69 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0021830832
Boson Index = 0.9978169168 |
| Photoelectric: |
PEFamatinite = 110.11 barns/electron
U=PEFamatinite x rElectron Density= 473.47 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Famatinite is Not Radioactive |
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Famatinite Classification
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| Dana Class: |
03.02.02.02 (03)Sulfides - Sulfosalts |
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(03.02)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.02.02)Luzonite Group |
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03.02.02.01 Luzonite Cu3AsS4 I 42m 4 2m |
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03.02.02.02 Famatinite Cu3SbS4 I 42m 4 2m |
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03.02.02.03 Permingeatite Cu3SbSe4 I 42m 4 2m |
| Strunz Class: |
02.KA.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.K - Sulfarsenates, Sulfantimonates |
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02.KA -Sulfarsenates with (As,Sb)S4 tetrahedra |
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02.KA.10 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m |
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02.KA.10 Barquillite! Cu2CdGeS4 I 42m 4 2m |
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02.KA.10 Famatinite Cu3SbS4 I 42m 4 2m |
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02.KA.10 Luzonite Cu3AsS4 I 42m 4 2m |
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02.KA.10 Permingeatite Cu3SbSe4 I 42m 4 2m |
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Other Famatinite Information
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| References: |
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Famatinite :
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
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Print or Cut-and-Paste your Famatinite Specimen Label here :
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Famatinite
Cu3SbS4
Dana No: 03.02.02.02 Strunz No: 02.KA.10
Locality:
Notes:
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