Wittite Mineral Data

Wittite Mineral Data
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General Wittite Information

Help on Chemical Formula: Chemical Formula: Pb3Bi4(S,Se)9
Help on Composition: Composition: Molecular Weight = 1,886.80 gm
   Bismuth   44.30 %  Bi
   Lead      32.94 %  Pb
   Selenium  12.55 %  Se
   Sulfur    10.20 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb3Bi4S6Se3
Help on Environment: Environment: Iolite bearing amphibolite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1924
Help on Locality: Locality: Galun, Koperberg, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for T. Witt, Swedish mining engineer.
Help on Name Pronunciation: Name Pronunciation: Wittite Say WITTITE
 

Wittite Image

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Wittite

Comments: Gray metallic wittite in quartz.
Location: Falu Mine, Falun, Kopparberg, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Wittite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.7671:1:3.799
Help on Cell Dimensions: Cell Dimensions: a = 7.21, b = 4.08, c = 15.5, Z = 1; beta = 98.75° V = 450.65 Den(Calc)= 6.95
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.887(1), 2.041(0.7), 3.434(0.7),3.529(0.5), 3.607(0.5), 3.848(0.5), 3.004(0.5),
 

Physical Properties of Wittite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Light lead gray.
Help on Density: Density: 7.12
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Wittite

Help on Optical Data: Optical Data: NCalc= 1.85 - from Gladstone-Dale relationship (KC = 0.1228) where Ncalc=Dcalc*KC+1
NCalc= 1.87 - from Gladstone-Dale relationship (KC = 0.1228) where Ncalc=Dmeas*KC+1
Help on RL Color: RL Color: Cream-white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Wittite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   43.20   45.30 
   
 420 nm   42.80   44.90 
 440 nm   42.40   44.50 
 460 nm   41.90   44.20 
 480 nm   41.50   43.80 
 500 nm   41.10   43.30 
 520 nm   40.50   42.80 
 540 nm   40.00   42.30 
 560 nm   39.40   41.80 
 580 nm   38.90   41.30 
 600 nm   38.40   40.90 
 620 nm   38.00   40.60 
 640 nm   37.70   40.40 
 660 nm   37.40   40.20 
 680 nm   37.30   39.80 
 700 nm   37.20   39.70 
Calculated Relative Intensity Colors of Wittite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210% 230%
R1                    
R2                    
 

Calculated Properties of Wittite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.72 gm/cc
note: Specific Gravity of Wittite =6.95 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.08
Boson Index = 0.92
Help on Photoelectric: Photoelectric: PEWittite =1,492.95 barns/electron
U=PEWittite x rElectron Density=8,534.89 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wittite is Not Radioactive
 

Wittite Classification
Help on Dana Class: Dana Class: 03.06.05.02 (03)Sulfides - Sulfosalts
  (03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.06.05)Dana Group
 
03.06.05.01 Cannizzarite Pb4Bi6S13 C 2/m 2/m
 
03.06.05.02 Wittite Pb3Bi4(S,Se)9 P 2/m 2/m
Help on Strunz Class: Strunz Class: 02.JB.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JB -Galena derivatives, with Pb
 
02.JB.20 Cannizzarite Pb4Bi6S13 C 2/m 2/m
 
02.JB.20 Wittite Pb3Bi4(S,Se)9 P 2/m 2/m
 

Other Wittite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Wittite :
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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Ask about Wittite here :
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Print or Cut-and-Paste your Wittite Specimen Label here :

Wittite

Pb3Bi4(S,Se)9
Dana No: 03.06.05.02 Strunz No: 02.JB.20
Locality:

 

Notes: