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Giraudite Mineral Data

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General Giraudite Information

Help on Chemical  Formula: Chemical Formula: (Cu,Zn,Ag)12(As,Sb)4(Se,S)13
Help on Composition: Composition: Molecular Weight = 2,042.97 gm
   Zinc      11.52 %  Zn
   Copper    22.40 %  Cu
   Silver     6.34 %  Ag
   Antimony   5.96 %  Sb
   Arsenic   11.00 %  As
   Selenium  37.68 %  Se
   Sulfur     5.10 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Cu7.2Zn3.6Ag1.2As3SbSe9.75S3.25
Help on Environment: Environment: As late stage deposits in veins cutting granite.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: From Chameane, Puy-de-Dome, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: To honor Roger Giraud, of the electron microprobe laboratory of the B.R.G.M.-C.N.R.S. in Orleans, France.
Help on Name Pronunciation: Name Pronunciation: Giraudite + Pronunciation Say GIRAUDITE
 

Giraudite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Giraudite   Hakite

Comments: Polished Section image of giraudite-hakite (gir-hak) with berzelianite (bzl ) and galena (gln). (CanMin, v40:1161).
Location: Niederschlema-Alberoda uranium deposit, Erzgebirge, Germany. Scale: See Image.
© Canadian Mineralogist

Giraudite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.578, Z = 2; V = 1,183.62 Den(Calc)= 5.73
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): 3.05(1), 1.868(0.9), 1.593(0.7),
 

Physical Properties of Giraudite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray, Steel gray.
Help on Density: Density: 5.75
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Metallic
Help on Streak: Streak: white
 

Optical Properties of Giraudite

Help on RL Color: RL Color: Light gray with a creamy tint.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Giraudite in Air
λ R  ∑ R(λ) 
 420 nm   32.20   
 440 nm   32.10 
 460 nm   31.80 
 480 nm   31.70 
 500 nm   31.60 
 520 nm   31.50 
 540 nm   31.70 
 560 nm   31.80 
 580 nm   31.70 
 600 nm   31.70 
 620 nm   31.80 
 640 nm   31.60 
 660 nm   31.50 
 680 nm   31.30 
 700 nm   30.80 
Calculated Relative Intensity Colors of Giraudite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270% 280%
R                        
 

Calculated Properties of Giraudite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.09 gm/cc
note: Specific Gravity of Giraudite =5.73 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEGiraudite = 90.89 barns/electron
U=PEGiraudite x rElectron Density= 462.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Giraudite is Not Radioactive
 

Giraudite Classification

Help on  Dana Class: Dana Class: 03.03.06.05 (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 Giraudite 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 Giraudite :
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 Giraudite Specimen Label here :

Giraudite

(Cu,Zn,Ag)12(As,Sb)4(Se,S)13
Dana No: 03.03.06.05 Strunz No: 02.GB.05
Locality:

 

Notes:

 

 
   
 


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