Mineralogy Database

Argyrodite Mineral Data

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General Argyrodite Information

Help on Chemical  Formula: Chemical Formula: Ag8GeS6
Help on Composition: Composition: Molecular Weight = 1,127.95 gm
   Silver     76.51 %  Ag
   Germanium   6.44 %  Ge
   Sulfur     17.06 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Ag8GeS6
Help on Environment: Environment: In low-temperature polymetallic deposits with silver sulfosalts (Freiberg, Germany); in high-temperature Sn-Ag deposits (Bolivia).
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1886
Help on Locality: Locality: From the Himmelsfurst and other mines, Erbisdorf, near Freiberg, Saxony, Germany. In the Fournial mine, Massiac region, Cantal, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the Greek for "silver-containing."
Help on Name Pronunciation: Name Pronunciation: Argyrodite + Pronunciation Say ARGYRODITE
 

Argyrodite Image

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  Argyrodite

Comments: Lead gray metallic aggregate of argyrodite crystals.
Location: Veta Galufa, Colquechaca, Potosi Dept., Bolivia. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Argyrodite

Comments: Gray, metallic, massive, crystalline argyrodite ore.
Location: Himmelsf├╝rst mine, Brand-Erbisdorf bei Freiberg, Erzgebirge, Sachsen. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Argyrodite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.0263:1:1.4163
Help on Cell Dimensions: Cell Dimensions: a = 15.149, b = 7.476, c = 10.589, Z = 4; V = 1,199.25 Den(Calc)= 6.25
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pna2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.05(1), 2.7(0.6), 3.08(0.4),
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
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I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 0) ( 1 1 1) ( 1 0 0) ( 0 0 1)

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Physical Properties of Argyrodite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black, Steel gray.
Help on Density: Density: 6.1 - 6.3, Average = 6.19
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: grayish black
 

Optical Properties of Argyrodite

Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Color: RL Color: Gray-white with a violet tint.
Help on RL Pleochroism: RL Pleochroism: Very weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Argyrodite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   27.40   29.30 
   
 420 nm   26.00   27.60 
 440 nm   25.20   26.60 
 460 nm   24.50   25.90 
 470 nm   24.20   25.60 
 480 nm   24.00   25.20 
 500 nm   23.70   24.80 
 520 nm   23.50   24.50 
 540 nm   23.30   24.30 
 546 nm   23.30   24.20 
 560 nm   23.30   24.20 
 580 nm   23.20   24.20 
 589 nm   23.20   24.10 
 600 nm   23.10   24.00 
 620 nm   23.10   24.00 
 640 nm   23.10   23.90 
 650 nm   23.20   24.00 
 660 nm   23.20   24.00 
 680 nm   23.20   24.00 
 700 nm   23.20   24.10 
Standardized Intensity (100%) Reflection Spectra of Argyrodite in Oil
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   11.10   12.00 
   
 420 nm   10.70   11.60 
 440 nm   10.30   11.00 
 460 nm    9.90   10.60 
 470 nm    9.80   10.50 
 480 nm    9.70   10.40 
 500 nm    9.70   10.30 
 520 nm    9.60   10.20 
 540 nm    9.50   10.00 
 546 nm    9.40   10.00 
 560 nm    9.40   10.00 
 580 nm    9.40   10.00 
 589 nm    9.40   10.00 
 600 nm    9.50   10.00 
 620 nm    9.50   10.00 
 640 nm    9.50   10.00 
 650 nm    9.50   10.00 
 660 nm    9.60   10.10 
 680 nm    9.60   10.10 
 700 nm    9.70   10.20 
Calculated Relative Intensity Colors of Argyrodite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360% 380%
R1                        
R2                        
Calculated Relative Intensity Colors of Argyrodite in Oil
Relative
Intensity
   0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 920%
R1                      
R2                      
 

Calculated Properties of Argyrodite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.59 gm/cc
note: Specific Gravity of Argyrodite =6.25 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0063004033
Boson Index = 0.9936995967
Help on Photoelectric: Photoelectric: PEArgyrodite = 200.29 barns/electron
U=PEArgyrodite x rElectron Density=1,118.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Argyrodite is Not Radioactive
 

Argyrodite Classification

Help on  Dana Class: Dana Class: 02.05.06.01 (02)Sulfides - Including Selenides and Tellurides
  (02.05)where Am Bn Xp, with (m+n):p=3:2
  (02.05.06)Argyrodite Group
 
02.05.06.01 Argyrodite Ag8GeS6 Pna2 mm2
 
02.05.06.02 Canfieldite Ag8SnS6 P na21 mm2
Help on  Strunz Class: Strunz Class: 02.BA.35 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)
  02.BA -With Cu, Ag, Au
 
02.BA.35 Argyrodite Ag8GeS6 Pna2 mm2
 
02.BA.35 Canfieldite Ag8SnS6 P na21 mm2
 
02.BA.35 Putzite! (Cu4.7Ag3.3)GeS6 F43m 4 3m
 

Other Argyrodite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(CanMin, 42:1762)
Help on See Also: See Also: Links to other databases for Argyrodite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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

Argyrodite

Ag8GeS6
Dana No: 02.05.06.01 Strunz No: 02.BA.35
Locality:

 

Notes:

 

 
   
 


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