Wittite Mineral Data + Say WITTITE


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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.
 

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 Diaphaniety: Diaphaniety: 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:

relectron=5.72 gm/cc
note: rWittite =6.95 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.08311
Boson Index = 0.91689
Help on Photoelectric: Photoelectric:

PEWittite =1,492.95 barns/electron
U=PEWittite x relectron=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: 3.6.5.2 (3)Sulfides - Sulfosalts
  (3.6)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.6.5)Dana Group
 
3.6.5.1 Cannizzarite Pb4Bi6S13 C 2/m 2/m
 
3.6.5.2 Wittite Pb3Bi4(S,Se)9 P 2/m 2/m
Help on Strunz Class: Strunz Class: II/E.34-65 II - Sulfides and sulphosalts
  II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts (Pb-Cu/Ag) with predominant Vismut x = 6.0 - 1.6
  II/E.34 - Cosalite - Galenobismuthite
 
II/E.34-08 Mozgovaite! PbBi4(S,Se)7 Bbmm 2/m 2/m 2/m
 
II/E.34-10 Cosalite Pb2Bi2S5 Pbnm 2/m 2/m 2/m
 
II/E.34-20 Proudite (Pb,Cu)8Bi9-10(S,Se)22 C 2/m 2/m
 
II/E.34-30 Weibullite Pb6Bi8(S,Se)18 P nma 2/m 2/m 2/m
 
II/E.34-60 Cannizzarite Pb4Bi6S13 C 2/m 2/m
 
II/E.34-65 Wittite Pb3Bi4(S,Se)9 P 2/m 2/m
 
II/E.34-70 Nordstromite Pb3CuBi7(S10Se4) P 21/m 2/m
 
II/E.34-80 Junoite Pb3Cu2Bi8(S,Se)16 C 2/m 2/m
 
II/E.34-85 Felbertalite! Cu2Pb6Bi8S19 C 2/m 2/m
 
II/E.34-90 Watkinsonite PbCu2Bi4(Se,S)8 Pm ? m
 
II/E.34-100 Paderaite AgPb2Cu6Bi11S22 P 21/m 2/m
 
II/E.34-110 Galenobismutite PbBi2S4 Pnam 2/m 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 - 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 Wittite Specimen Label here :

Wittite

Pb3Bi4(S,Se)9
Dana No: 3.6.5.2 Strunz No: II/E.34-65
Locality:

 

Notes:

 
 
   
 
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