Boulangerite Mineral Data + Say BOULANGERITE


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General Boulangerite Information
Help on Chemical Formula: Chemical Formula: Pb5Sb4S11
Help on Composition: Composition: Molecular Weight = 1,887.90 gm
   Antimony  26.44 %  Sb
   Lead      54.88 %  Pb
   Sulfur    18.68 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb5Sb4.1S11
Help on Environment: Environment: Low to moderate temperature hydrothermal veins.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1837
Help on Locality: Locality: Molières, Gard, Languedoc-Roussillon, France Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the French mining engineer, C. L. Boulanger (1810-1849). Later name from an occurrence near Mullan, Idaho.
Help on Synonym: Synonym: Mullanite
 

Boulangerite Image

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Boulangerite

Comments: Specimen of sulfide rich matrix with a surface coated with hair-like crystals of boulangerite.
Location: Noche Buena Mine, Zacatecas, Mexico. Scale: 9 x 6.5 cm.
© John Veevaert

Boulangerite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.5315:1:0.2126
Help on Cell Dimensions: Cell Dimensions: a = 32.443, b = 21.183, c = 4.505, Z = 6; V = 3,096.02 Den(Calc)= 6.08
Help on Crystal System: Crystal System: OrthorhombicSpace Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.731(1), 3.218(0.45), 3.025(0.4),
Help on Forms: Forms:

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Forms: [ 1 3 0] [ 0 1 0] [ 0 3 1] [ 1 0 0] [ 1 1 0]

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Born L , Hellner E , American Mineralogist , 45 (1960) p.1266-1271, A structural proposal for boulangerite

View Additional jPOWD Structure files for Boulangerite
[1]
 

Physical Properties of Boulangerite

Help on Cleavage: Cleavage: [001] Indistinct, [010] Indistinct
Help on Color: Color: Lead gray, Blue gray, Gray.
Help on Density: Density: 5.7 - 6.3, Average = 6
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Plumose - "Mica-like" minerals forming aggregates of plume-like forms.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: reddish brown
 

Optical Properties of Boulangerite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Pleochroism: RL Pleochroism: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Boulangerite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   41.20   42.80 
   
 420 nm   40.30   42.40 
 440 nm   39.40   42.00 
 460 nm   39.20   41.90 
 480 nm   38.50   40.40 
 500 nm   37.40   39.30 
 520 nm   37.90   40.10 
 540 nm   38.00   40.30 
 560 nm   37.80   40.20 
 580 nm   37.40   39.90 
 600 nm   37.10   39.60 
 620 nm   36.90   39.50 
 640 nm   36.60   39.10 
 660 nm   36.10   38.60 
 680 nm   35.50   37.90 
 700 nm   35.00   37.10 
Calculated Relative Intensity Colors of Boulangerite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210% 240%
R1                    
R2                    
 

Calculated Properties of Boulangerite

Help on Electron Density: Electron Density:

relectron=5.12 gm/cc
note: rBoulangerite =6.08 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.12267
Boson Index = 0.87733
Help on Photoelectric: Photoelectric:

PEBoulangerite =1,093.55 barns/electron
U=PEBoulangerite x relectron=5,600.36 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Boulangerite is Not Radioactive
 

Boulangerite Classification
Help on Dana Class: Dana Class: 3.5.2.1 (3)Sulfides - Sulfosalts
  (3.5)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.5.2)Dana Group
 
3.5.2.1 Boulangerite Pb5Sb4S11 Unk Ortho
 
3.5.2.2 Falkmanite Pb5Sb4S11 Mono
Help on Strunz Class: Strunz Class: II/E.19-30 II - Sulfides and sulphosalts
  II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts with predominant Antimon x = 3.0 - 1.9
  II/E.19 - Falkmanite - Jaskolskiite series
 
II/E.19-10 Falkmanite Pb5Sb4S11 Mono
 
II/E.19-20 Ardaite Pb19Sb13S35Cl7 Unk Mono
 
II/E.19-30 Boulangerite Pb5Sb4S11 Unk Ortho
 
II/E.19-40 Plumosite* Pb2Sb2S5 Mono
 
II/E.19-42 Moeloite! Pb6Sb6S14(S3) P 21221 2 2 2
 
II/E.19-45 Pillaite! Pb9Sb10S23ClO0.5 C 2/m 2/m
 
II/E.19-50 Jaskolskiite Pb2xCux(Sb,Bi)2-xS5,x=0.2 Pbnm 2/m 2/m 2/m
 

Other Boulangerite Information
Help on References: References: NAME( Ford32) PHYS. PROP.(EurJMin, v 13, p 411) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Boulangerite :
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 - Minerals of Wisconsin 16 -QUT Mineral Atlas 17 - Scandinavian mineral gallery 18 - WWW-MINCRYST 19 -École des Mines de Paris

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Boulangerite

Pb5Sb4S11
Dana No: 3.5.2.1 Strunz No: II/E.19-30
Locality:

 

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