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Boulangerite Mineral Data

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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: Moli�res, 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 Name Pronunciation: Name Pronunciation: Boulangerite + Pronunciation Say BOULANGERITE
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: Orthorhombic Space 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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Help on Above

Forms: ( 1 3 0) ( 0 1 0) ( 0 3 1) ( 1 0 0) ( 1 1 0)

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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 Diaphaneity: Diaphaneity: 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: Non-fluorescent.
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: Bulk Density (Electron Density)=5.12 gm/cc
note: Specific Gravity of Boulangerite =6.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.12
Boson Index = 0.88
Help on Photoelectric: Photoelectric: PEBoulangerite =1,093.55 barns/electron
U=PEBoulangerite x rElectron Density=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: 03.05.02.01 (03)Sulfides - Sulfosalts
  (03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.05.02)Dana Group
 
03.05.02.01 Boulangerite Pb5Sb4S11 Unk Ortho
 
03.05.02.02 Falkmanite Pb5Sb4S11 Mono
Help on  Strunz Class: Strunz Class: 02.HC.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HC -With only Pb
 
02.HC.15 Boulangerite Pb5Sb4S11 Unk Ortho
 
02.HC.15 Falkmanite Pb5Sb4S11 Mono
 
02.HC.15 Plumosite* Pb2Sb2S5 Mono
 

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 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - Scandinavian mineral gallery
18 - WWW-MINCRYST

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Boulangerite

Pb5Sb4S11
Dana No: 03.05.02.01 Strunz No: 02.HC.15
Locality:

 

Notes:

 

 
   
 


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