Mineralogy Database

Glaucodot Mineral Data

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General Glaucodot Information

Help on Chemical  Formula: Chemical Formula: (Co,Fe)AsS
Help on Composition: Composition: Molecular Weight = 165.15 gm
   Iron      8.45 %  Fe
   Cobalt   26.76 %  Co
   Arsenic  45.37 %  As
   Sulfur   19.42 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Co0.75Fe2+0.25AsS
Help on Environment: Environment: Found in deep-seated deposits of high-temperature origin.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1849
Help on Locality: Locality: In Sweden, at Hakansbo, Vastmanland, as large twinned and untwinned crystals. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for "blue," in reference to its use in the dark blue glass called smalt.
Help on Name Pronunciation: Name Pronunciation: Glaucodot + Pronunciation Say GLAUCODOT
 

Glaucodot Image

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  Glaucodot

Comments: Metallic lustered crystal of glaucodot on matrix.
Location: Hakansboda, Vastmanland, Sweden. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Glaucodot Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.234:1:0.1987
Help on Cell Dimensions: Cell Dimensions: a = 6.63, b = 28.33, c = 5.63, Z = 24; V = 1,057.47 Den(Calc)= 6.22
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: C mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.72(1), 1.827(0.9), 2.45(0.8),
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: ( 2 1 0) ( 1 0 1)

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Physical Properties of Glaucodot

Help on Cleavage: Cleavage: {010} Perfect, {101} Distinct
Help on Color: Color: Grayish tin white, Reddish silver white.
Help on Density: Density: 5.9 - 6.01, Average = 5.95
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Glaucodot

Help on RL Anisotrophism: RL Anisotrophism: Distinct, less strong than arsenopyrite.
Help on RL Pleochroism: RL Pleochroism: Less distinct than arsenopyrite.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Glaucodot in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   47.90   52.00 
   
 420 nm   48.30   51.80 
 440 nm   48.70   51.60 
 460 nm   49.10   51.50 
 480 nm   49.40   51.40 
 500 nm   49.60   51.30 
 520 nm   49.90   51.20 
 540 nm   50.20   51.10 
 560 nm   50.50   51.10 
 580 nm   50.60   51.00 
 600 nm   50.70   50.90 
 620 nm   51.00   50.70 
 640 nm   51.10   50.60 
 660 nm   51.10   50.50 
 680 nm   51.10   50.50 
 700 nm   51.60   50.50 
Calculated Relative Intensity Colors of Glaucodot in Air
Relative
Intensity
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180%
R1                    
R2                    
 

Calculated Properties of Glaucodot

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.71 gm/cc
note: Specific Gravity of Glaucodot =6.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0032484804
Boson Index = 0.9967515196
Help on Photoelectric: Photoelectric: PEGlaucodot = 45.20 barns/electron
U=PEGlaucodot x rElectron Density= 257.93 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Glaucodot is Not Radioactive
 

Glaucodot Classification

Help on  Dana Class: Dana Class: 02.12.06.01 (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.06)Dana Group
 
02.12.06.01 Glaucodot (Co,Fe)AsS C mmm 2/m 2/m 2/m
 
02.12.06.02 Alloclasite (Co,Fe)AsS P 22121 2 2 2
Help on  Strunz Class: Strunz Class: 02.EB.10c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.E - Metal Sulfides, M:S � 1:2
  02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc.
 
02.EB.10c Glaucodot (Co,Fe)AsS C mmm 2/m 2/m 2/m
 

Other Glaucodot 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 Glaucodot :
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 - HyperPhysics
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Scandinavian mineral gallery

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

Glaucodot

(Co,Fe)AsS
Dana No: 02.12.06.01 Strunz No: 02.EB.10c
Locality:

 

Notes:

 

 
   
 


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