Mineralogy Database

Mattagamite Mineral Data

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General Mattagamite Information

Help on Chemical  Formula: Chemical Formula: CoTe2
Help on Composition: Composition: Molecular Weight = 314.13 gm
   Cobalt     18.76 %  Co
   Tellurium  81.24 %  Te
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: CoTe2
Help on Environment: Environment: In a small telluride zone in a massive zinc-rich stratiform deposit in Archaen volcanics.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: Mattagami Lake mines, Mattagami, Galinee Township, Abitibi Co., Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Mattagamite + Pronunciation Say MATTAGAMITE
Help on Synonym: Synonym: ICSD 25678
  IMA1972-003
  PDF 11-553
 

Mattagamite Image

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  Mattagamite   Altaite   Tellurantimony

Comments: Silvery metallic intergrowths of mattagamite with tellurantimony and altaite.
Location: Mattagami Lake Mine, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mattagamite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8415:1:0.6164
Help on Cell Dimensions: Cell Dimensions: a = 5.31, b = 6.31, c = 3.89, Z = 2; V = 130.34 Den(Calc)= 8.00
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.805(1), 2.703(0.8), 2.066(0.6),
 

Physical Properties of Mattagamite

Help on Color: Color: Violet, Violet gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Metallic
 

Optical Properties of Mattagamite

Help on RL Anisotrophism: RL Anisotrophism: Weak, pinkish violet to grayish violet.
Help on RL Color: RL Color: Violet.
Help on RL Pleochroism: RL Pleochroism: Weak, colors from pink to cream.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Mattagamite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   50.20   62.20 
   
 420 nm   51.00   60.30 
 440 nm   51.80   58.40 
 460 nm   51.00   56.60 
 480 nm   49.90   55.60 
 500 nm   48.70   54.70 
 520 nm   48.20   54.20 
 540 nm   47.90   53.90 
 560 nm   47.80   53.90 
 580 nm   47.70   54.00 
 600 nm   47.80   54.30 
 620 nm   48.00   54.70 
 640 nm   48.30   55.20 
 660 nm   48.60   55.60 
 680 nm   48.90   56.30 
 700 nm   49.10   56.90 
Calculated Relative Intensity Colors of Mattagamite in Air
Relative
Intensity
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180% 190%
R1                      
R2                      
 

Calculated Properties of Mattagamite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.67 gm/cc
note: Specific Gravity of Mattagamite =8.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEMattagamite = 306.08 barns/electron
U=PEMattagamite x rElectron Density=2,042.28 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mattagamite is Not Radioactive
 

Mattagamite Classification

Help on  Dana Class: Dana Class: 02.12.02.05 (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.02)Marcasite Group (Orthorhombic: Pnnm)
 
02.12.02.01 Marcasite FeS2 Pnnm 2/m 2/m 2/m
 
02.12.02.02 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m
 
02.12.02.03 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m
 
02.12.02.04 Hastite? CoSe2 Pnnm 2/m 2/m 2/m
 
02.12.02.05 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m
 
02.12.02.06 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m
 
02.12.02.07 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m
 
02.12.02.08 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m
 
02.12.02.09 Lollingite FeAs2 Pnnm 2/m 2/m 2/m
 
02.12.02.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m
 
02.12.02.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m
 
02.12.02.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m
 
02.12.02.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.EB.10a 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.10a Frohbergite FeTe2 Pnnm 2/m 2/m 2/m
 
02.EB.10a Hastite? CoSe2 Pnnm 2/m 2/m 2/m
 
02.EB.10a Ferroselite FeSe2 Pnnm 2/m 2/m 2/m
 
02.EB.10a Kullerudite NiSe2 Pnnm 2/m 2/m 2/m
 
02.EB.10a Mattagamite CoTe2 Pnnm 2/m 2/m 2/m
 
02.EB.10a Marcasite FeS2 Pnnm 2/m 2/m 2/m
 

Other Mattagamite 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 Mattagamite :
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 Mattagamite Specimen Label here :

Mattagamite

CoTe2
Dana No: 02.12.02.05 Strunz No: 02.EB.10a
Locality:

 

Notes:

 

 
   
 


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