Mineralogy Database

Briartite Mineral Data

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General Briartite Information

Help on Chemical  Formula: Chemical Formula: Cu2(Zn,Fe)GeS4
Help on Composition: Composition: Molecular Weight = 390.97 gm
   Zinc       12.54 %  Zn
   Iron        3.57 %  Fe
   Copper     32.51 %  Cu
   Germanium  18.57 %  Ge
   Sulfur     32.81 %  S
             100.00 % 
Help on Empirical Formula: Empirical Formula: Cu2Zn0.75Fe2+0.25GeS4
Help on Environment: Environment: As inclusions in other Ge-Ga-bearing sulfides.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: From Kipushi, Shaba Province, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Gaston Briart, who studied the Kipushi deposit.
Help on Name Pronunciation: Name Pronunciation: Briartite + Pronunciation Say BRIARTITE
Help on Synonym: Synonym: ICSD 47165
  PDF 26-527

Briartite Image

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  Briartite   Catamarcaite   Bornite

Comments: Briartite-type phase (Bri) in close association with catamarcaite (Ct) lining a cavity in massive bornite (Bn) - chalcocite (Cc) ore; Sp is sphalerite (CanMin v44:1481).
Location: Bornite-rich ore from old dumps near the La Rosario vein, Capillitas epithermal deposit, Catamarca Province, Argentina.. Scale: See Image.
© Canadian Mineralogist

Briartite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.97556
Help on Cell Dimensions: Cell Dimensions: a = 5.32, c = 10.51, Z = 2; V = 297.46 Den(Calc)= 4.36
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.06(1), 1.87(0.5), 1.89(0.5),

Physical Properties of Briartite

Help on Color: Color: Blue gray, Gray, Iron gray.
Help on Density: Density: 4.5
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Metallic

Optical Properties of Briartite

Help on RL Anisotrophism: RL Anisotrophism: Weak in air, distinct in oil.
Help on RL Color: RL Color: Gray to gray blue.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Briartite in Air
λ R  ∑ R(λ) 
 400 nm   23.40   
 420 nm   24.20 
 440 nm   25.00 
 460 nm   25.70 
 480 nm   26.40 
 500 nm   27.00 
 520 nm   27.40 
 540 nm   27.60 
 560 nm   27.50 
 580 nm   27.20 
 600 nm   26.80 
 620 nm   26.00 
 640 nm   25.00 
 660 nm   23.80 
 680 nm   22.50 
 700 nm   21.20 
Calculated Relative Intensity Colors of Briartite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 350%

Calculated Properties of Briartite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.08 gm/cc
note: Specific Gravity of Briartite =4.36 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEBriartite = 35.41 barns/electron
U=PEBriartite x rElectron Density= 144.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Briartite is Not Radioactive

Briartite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.02)Stannite Group (Tetragonal: I-42m) A2BCS type Stannite Cu2FeSnS4 I 42m 4 2m Cernyite Cu2CdSnS4 I 42m 4 2m Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m Kuramite Cu3SnS4 I 42m 4 2m Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 432, P 43m, or P m3m Cubic Hocartite Ag2FeSnS4 I 42m 4 2m Pirquitasite Ag2ZnSnS4 I 42m 4 2m Velikite Cu2HgSnS4 I 42m 4 2m Kesterite Cu2(Zn,Fe)SnS4 I 4 4 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m Barquillite! Cu2CdGeS4 I 42m 4 2m
Help on  Strunz Class: Strunz Class: 02.KA.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.K - Sulfarsenates, Sulfantimonates
  02.KA -Sulfarsenates with (As,Sb)S4 tetrahedra
02.KA.10 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m
02.KA.10 Barquillite! Cu2CdGeS4 I 42m 4 2m
02.KA.10 Famatinite Cu3SbS4 I 42m 4 2m
02.KA.10 Luzonite Cu3AsS4 I 42m 4 2m
02.KA.10 Permingeatite Cu3SbSe4 I 42m 4 2m

Other Briartite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Briartite :
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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Dana No: Strunz No: 02.KA.10





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