Mineralogy Database

Berthierite Mineral Data

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General Berthierite Information

Help on Chemical  Formula: Chemical Formula: FeSb2S4
Help on Composition: Composition: Molecular Weight = 427.61 gm
   Iron      13.06 %  Fe
   Antimony  56.94 %  Sb
   Sulfur    30.00 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+Sb2S4
Help on Environment: Environment: In low-temperature hydrothermal antimony veins.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1827
Help on Locality: Locality: Pontgibaud, Puy-de-Dome, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the French chemist, P. Berthier (1782-1861).
Help on Name Pronunciation: Name Pronunciation: Berthierite + Pronunciation Say BERTHIERITE
Help on Synonym: Synonym: Anglarite

Berthierite Image

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Comments: Prismatic crystals of berthierite, tarnished bronze metallic, with stibnite and quartz crystals.
Location: San Martin Mine, Zacatecas, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Berthierite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8101:1:0.2662
Help on Cell Dimensions: Cell Dimensions: a = 11.44, b = 14.12, c = 3.76, Z = 4; V = 607.36 Den(Calc)= 4.68
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.68(1), 2.63(0.8), 4.37(0.6),

Physical Properties of Berthierite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Dark steel gray, Dark brownish gray.
Help on Density: Density: 4 - 4.6, Average = 4.3
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Streak: Streak: brownish gray

Optical Properties of Berthierite

Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on RL Color: RL Color: Gray.
Help on RL Pleochroism: RL Pleochroism: Marked.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Berthierite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   33.00   43.00 
 420 nm   32.40   42.80 
 440 nm   31.80   42.60 
 460 nm   31.30   42.30 
 480 nm   31.00   42.00 
 500 nm   30.80   41.60 
 520 nm   30.80   41.20 
 540 nm   30.90   40.80 
 560 nm   31.20   40.30 
 580 nm   31.50   39.80 
 600 nm   31.70   39.40 
 620 nm   31.90   39.00 
 640 nm   32.00   38.70 
 660 nm   32.00   38.30 
 680 nm   31.90   38.00 
 700 nm   31.60   37.60 
Calculated Relative Intensity Colors of Berthierite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270% 290%

Calculated Properties of Berthierite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.20 gm/cc
note: Specific Gravity of Berthierite =4.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0050184312
Boson Index = 0.9949815688
Help on Photoelectric: Photoelectric: PEBerthierite = 192.42 barns/electron
U=PEBerthierite x rElectron Density= 808.70 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Berthierite is Not Radioactive

Berthierite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.09)Galenobismutite Group Galenobismutite PbBi2S4 Pnam 2/m 2/m 2/m Sakharovaite? (Pb,Fe)(Bi,Sb)2S4 Mono Berthierite FeSb2S4 Pnam 2/m 2/m 2/m Garavellite FeSbBiS4 Pnam 2/m 2/m 2/m Clerite! MnSb2S4 Pnam 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.HA.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HA -With Cu, Ag, Fe (without Pb)
02.HA.20 Berthierite FeSb2S4 Pnam 2/m 2/m 2/m
02.HA.20 Clerite! MnSb2S4 Pnam 2/m 2/m 2/m
02.HA.20 Garavellite FeSbBiS4 Pnam 2/m 2/m 2/m

Other Berthierite 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 Berthierite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - HyperPhysics
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info

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Dana No: Strunz No: 02.HA.20





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