Bournonite Mineral Data + Say BOURNONITE


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General Bournonite Information
Help on Chemical Formula: Chemical Formula: PbCuSbS3
Help on Composition: Composition: Molecular Weight = 488.69 gm
   Copper    13.00 %  Cu
   Antimony  24.91 %  Sb
   Lead      42.40 %  Pb
   Sulfur    19.68 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: PbCuSbS3
Help on Environment: Environment: Moderate temperature hydrothermal veins.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1805
Help on Locality: Locality: Wheal Boys, St Endellion, Cornwall, England Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the French mineralogist, J. L. de Bournon (1751-1825).
Help on Synonym: Synonym: Endellionite
  ICSD 14303
  PDF 42-1407
  Wheel Ore
 

Bournonite Image

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Bournonite

Comments: Lustrous, silvery crystals of bournonite on massive bournonite.
Location: Mercedes Mine, Huanuco Dept., Peru. Scale: 3x3x2.7 cm.
© Isaias Casanova / IC Minerals
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Bournonite

Comments: Bright, blocky crystalline aggregate of steel gray bournonite crystals.
Location: Yao-gan-xian mine, Hunan China. Scale: Picture size 2 cm.
© Fabre Minerals

Bournonite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9379:1:0.8965
Help on Cell Dimensions: Cell Dimensions: a = 8.16, b = 8.7, c = 7.8, Z = 2; V = 553.74 Den(Calc)= 2.93
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pn21m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.74(1), 1.768(0.5), 2.685(0.45),
Help on Forms: Forms:

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Forms: [ 0 1 0] [ 0 1 1] [ 1 0 1] [ 1 1 0] [ 1 0 0] [ 0 0 1]

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Edenharter A , Nowacki W , Takeuchi Y , Zeitschrift fur Kristallographie , 131 (1970) p.397-417, Verfeinerung der kristallstruktur von bournonit [SbS3)2|Cu(IV)2PB(VII)Pb(VIII)], und von seligmannit [(AsS3)2)|Cu(IV)2Pb(VII)PB(VIII)], Locality: Kanton Graubunden

 

Physical Properties of Bournonite

Help on Cleavage: Cleavage: [010] Imperfect
Help on Color: Color: Gray, Black, Steel gray.
Help on Density: Density: 5.7 - 5.9, Average = 5.8
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Cog-wheel - Generally six sided twinned crystals forming Cog-Wheel shapes
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Pseudo Cubic - Crystals show a cubic outline.
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: gray
 

Optical Properties of Bournonite

Help on RL Anisotrophism: RL Anisotrophism: Weak in air.
Help on RL Pleochroism: RL Pleochroism: Very weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Bournonite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   37.30   37.00 
   
 420 nm   37.40   37.70 
 440 nm   37.50   38.40 
 460 nm   36.90   38.00 
 480 nm   36.20   37.40 
 500 nm   35.60   37.00 
 520 nm   35.00   36.60 
 540 nm   34.50   36.30 
 560 nm   34.00   36.00 
 580 nm   33.60   35.50 
 600 nm   33.00   34.90 
 620 nm   32.60   34.20 
 640 nm   32.20   33.50 
 660 nm   31.80   32.90 
 680 nm   31.40   32.40 
 700 nm   31.20   32.00 
Calculated Relative Intensity Colors of Bournonite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270%
R1                      
R2                      
 

Calculated Properties of Bournonite

Help on Electron Density: Electron Density:

relectron=2.52 gm/cc
note: rBournonite =2.93 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.09517
Boson Index = 0.90483
Help on Photoelectric: Photoelectric:

PEBournonite = 850.10 barns/electron
U=PEBournonite x relectron=2,140.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bournonite is Not Radioactive
 

Bournonite Classification
Help on Dana Class: Dana Class: 3.4.3.2 (3)Sulfides - Sulfosalts
  (3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.4.3)Dana Group
 
3.4.3.1 Seligmannite PbCuAsS3 Pmmn 2/m 2/m 2/m
 
3.4.3.2 Bournonite PbCuSbS3 Pn21m 2/m 2/m 2/m
 
3.4.3.3 Soucekite PbCuBi(S,Se)3 Pn21m mm2
Help on Strunz Class: Strunz Class: II/E.16-20 II - Sulfides and sulphosalts
  II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts with As/Sb, x=3,0-2,5
  II/E.16 - Seligmannite - Bournonite series
 
II/E.16-10 Seligmannite PbCuAsS3 Pmmn 2/m 2/m 2/m
 
II/E.16-20 Bournonite PbCuSbS3 Pn21m 2/m 2/m 2/m
 

Other Bournonite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Bournonite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (UofA) 10 - HyperPhysics 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 - Philatelic Mineralogy 16 -QUT Mineral Atlas 17 - Scandinavian mineral gallery 18 - WWW-MINCRYST 19 -École des Mines de Paris

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Bournonite

PbCuSbS3
Dana No: 3.4.3.2 Strunz No: II/E.16-20
Locality:

 

Notes:

 
 
   
 
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