Bournonite Mineral Data

Bournonite Mineral Data
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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 Name Pronunciation: Name Pronunciation: Bournonite + Pronunciation Say BOURNONITE
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 Diaphaneity: Diaphaneity: 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: Non-fluorescent.
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: Bulk Density (Electron Density)=2.52 gm/cc
note: Specific Gravity of Bournonite =2.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PEBournonite = 850.10 barns/electron
U=PEBournonite x rElectron Density=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: 03.04.03.02 (03)Sulfides - Sulfosalts
  (03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.04.03)Seligmannite Group
 
03.04.03.01 Seligmannite PbCuAsS3 Pmmn 2/m 2/m 2/m
 
03.04.03.02 Bournonite PbCuSbS3 Pn21m 2/m 2/m 2/m
 
03.04.03.03 Soucekite PbCuBi(S,Se)3 Pn21m mm2
Help on Strunz Class: Strunz Class: 02.GA.50 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.G - Sulfarsenites, sulfantimonites, sulfbismuthites
  02.GA -Neso-sulfarsenites, etc., without additional S
 
02.GA.50 Bournonite PbCuSbS3 Pn21m 2/m 2/m 2/m
 
02.GA.50 Seligmannite PbCuAsS3 Pmmn 2/m 2/m 2/m
 
02.GA.50 Soucekite PbCuBi(S,Se)3 Pn21m mm2
 

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 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
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 - Ruff.Info
18 - Scandinavian mineral gallery
19 - WWW-MINCRYST

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Bournonite

PbCuSbS3
Dana No: 03.04.03.02 Strunz No: 02.GA.50
Locality:

 

Notes: