Weissite Mineral Data + Say WEISSITE


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General Weissite Information
Help on Chemical Formula: Chemical Formula: Cu1.9Te
Help on Composition: Composition: Molecular Weight = 248.34 gm
   Copper     48.62 %  Cu
   Tellurium  51.38 %  Te
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: Cu1.9Te
Help on Environment: Environment: Telluride ore deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1927
Help on Locality: Locality: Good Hope and Mammoth Chimney Mines at Vulcan, Gunnison County, Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Louis Weiss, owner of the Good Hope mine and discoverer of rickardite.
Help on Synonym: Synonym: ICSD 42158
  PDF 45-1285
 

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Weissite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.57234
Help on Cell Dimensions: Cell Dimensions: a = 8.432, c = 21.69, Z = 24; V = 1,335.52 Den(Calc)= 7.41
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.09(1), 2.01(0.7), 3.61(0.7),
 

Physical Properties of Weissite

Help on Cleavage: Cleavage: None
Help on Color: Color: Bluish black, Dark blue black, Black.
Help on Density: Density: 6
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: black
 

Optical Properties of Weissite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Pleochroism: RL Pleochroism: Distinct.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Weissite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   40.30   41.60 
   
 420 nm   39.80   41.30 
 440 nm   38.90   40.60 
 460 nm   37.90   39.60 
 480 nm   36.90   38.40 
 500 nm   35.90   37.10 
 520 nm   34.80   35.90 
 540 nm   33.70   34.90 
 560 nm   32.60   34.00 
 580 nm   31.50   33.10 
 600 nm   30.50   32.50 
 620 nm   29.60   32.00 
 640 nm   28.90   31.60 
 660 nm   28.10   31.20 
 680 nm   27.30   30.80 
 700 nm   26.40   30.20 
Calculated Relative Intensity Colors of Weissite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270% 290%
R1                        
R2                        
 

Calculated Properties of Weissite

Help on Electron Density: Electron Density:

relectron=6.39 gm/cc
note: rWeissite =7.41 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.04105
Boson Index = 0.95895
Help on Photoelectric: Photoelectric:

PEWeissite = 206.37 barns/electron
U=PEWeissite x relectron=1,318.97 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Weissite is Not Radioactive
 

Weissite Classification
Help on Dana Class: Dana Class: 2.4.8.1 (2)Sulfides - Including Selenides and Tellurides
  (2.4)where Am Bn Xp, with (m+n):p=2:1
  (2.4.8)Dana Group
 
2.4.8.1 Weissite Cu1.9Te P 6/mmm 6/m 2/m 2/m
Help on Strunz Class: Strunz Class: II/B.04-10 II - Sulfides and sulphosalts
  II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Selenides with predominant Copper
  II/B.04 - Weissite - Richardite series
 
II/B.04-10 Weissite Cu1.9Te P 6/mmm 6/m 2/m 2/m
 
II/B.04-20 Rickardite Cu7Te5 Unk Ortho
 

Other Weissite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Weissite :
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 -École des Mines de Paris

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

Weissite

Cu1.9Te
Dana No: 2.4.8.1 Strunz No: II/B.04-10
Locality:

 

Notes:

 
 
   
 
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