Frohbergite Mineral Data + Say FROHBERGITE


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General Frohbergite Information
Help on Chemical Formula: Chemical Formula: FeTe2
Help on Composition: Composition: Molecular Weight = 311.05 gm
   Iron       17.95 %  Fe
   Tellurium  82.05 %  Te
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+Te2
Help on Environment: Environment: In hydrothermal ore deposits, rimming chalcopyrite grains, and as inclusions in gold, petzite, or chalcopyrite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1947
Help on Locality: Locality: From the Robb-Montbray and Oranda mines, Quebec. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Dr. Max Hans Frohberg, mining geologist, Toronto, Canada.
Help on Synonym: Synonym: ICSD 25679
  PDF 14-419
 

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Frohbergite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.8434:1:0.615
Help on Cell Dimensions: Cell Dimensions: a = 5.28, b = 6.26, c = 3.85, Z = 2; V = 127.25 Den(Calc)= 8.12
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.81(1), 2.71(0.7), 2.07(0.5),
Click Here for Large Frohbergite Structure Window Crystal Structure:

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Tengner S , Zeitschrift fur Anorganische und Allgemeine Chemie , 239 (1938) p.126-132, Uber diselenide und ditelluride von eisen, kobalt und nickel

 

Physical Properties of Frohbergite

Help on Cleavage: Cleavage: None
Help on Color: Color: Silver white, Tin white.
Help on Density: Density: 8.055
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Metallic
 

Optical Properties of Frohbergite

Help on RL Anisotrophism: RL Anisotrophism: Strong, orange-red to inky blue.
Help on RL Color: RL Color: White with bluish or pinkish tint.
Help on RL Pleochroism: RL Pleochroism: Extremely weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Frohbergite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   56.70   57.10 
   
 420 nm   54.80   56.20 
 440 nm   52.90   55.30 
 460 nm   51.90   54.50 
 480 nm   51.10   53.80 
 500 nm   50.60   53.10 
 520 nm   50.10   52.60 
 540 nm   50.00   52.40 
 560 nm   50.20   52.50 
 580 nm   50.70   53.00 
 600 nm   51.40   53.80 
 620 nm   52.20   54.50 
 640 nm   53.00   55.40 
 660 nm   53.90   56.30 
 680 nm   55.00   57.40 
 700 nm   56.20   58.50 
Calculated Relative Intensity Colors of Frohbergite in Air
Relative
Intensity		    0%   20%   40%   60%   80% 100% 120% 140% 160% 180%
R1                    
R2                    
 

Calculated Properties of Frohbergite

Help on Electron Density: Electron Density:

relectron=6.79 gm/cc
note: rFrohbergite =8.12 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.06936
Boson Index = 0.93064
Help on Photoelectric: Photoelectric:

PEFrohbergite = 307.26 barns/electron
U=PEFrohbergite x relectron=2,085.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Frohbergite is Not Radioactive
 

Frohbergite Classification
Help on Dana Class: Dana Class: 2.12.2.3 (2)Sulfides - Including Selenides and Tellurides
  (2.12)where Am Bn Xp, with (m+n):p=1:2
  (2.12.2)Marcasite Group (Orthorhombic: Pnnm)
 
2.12.2.1 Marcasite FeS2 Pnnm 2/m 2/m 2/m
 
2.12.2.2 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.3 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m
 
2.12.2.4 Hastite CoSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.5 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m
 
2.12.2.6 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m
 
2.12.2.7 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.8 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.9 Lollingite FeAs2 Pnnm 2/m 2/m 2/m
 
2.12.2.10 Seinajokite (Fe,Ni)(Sb,As)2 Pnnm 2/m 2/m 2/m
 
2.12.2.11 Safflorite (Co,Fe)As2 Pnnm 2/m 2/m 2/m
 
2.12.2.12 Rammelsbergite NiAs2 Pnnm 2/m 2/m 2/m
 
2.12.2.13 Nisbite NiSb2 Pnnm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: II/D.20-50 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.20 - Markasite - Iridarsenite series
 
II/D.20-10 Marcasite FeS2 Pnnm 2/m 2/m 2/m
 
II/D.20-20 Ferroselite FeSe2 Pnnm 2/m 2/m 2/m
 
II/D.20-30 Hastite CoSe2 Pnnm 2/m 2/m 2/m
 
II/D.20-40 Kullerudite NiSe2 Pnnm 2/m 2/m 2/m
 
II/D.20-50 Frohbergite FeTe2 Pnnm 2/m 2/m 2/m
 
II/D.20-60 Mattagamite CoTe2 Pnnm 2/m 2/m 2/m
 
II/D.20-70 Anduoite (Ru,Os)As2 Pnnm 2/m 2/m 2/m
 
II/D.20-80 Omeiite (Os,Ru)As2 Pnnm 2/m 2/m 2/m
 
II/D.20-90 Iridarsenite (Ir,Ru)As2 P 21/c 2/m
 

Other Frohbergite 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 Frohbergite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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

Frohbergite

FeTe2
Dana No: 2.12.2.3 Strunz No: II/D.20-50
Locality:

 

Notes:

 
 
   
 
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