Mineralogy Database

Viaeneite Mineral Data

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General Viaeneite Information

Help on Chemical  Formula: Chemical Formula: (Fe,Pb)4S8O
Help on Composition: Composition: Molecular Weight = 526.19 gm
   Iron    40.33 %  Fe
   Lead     7.88 %  Pb
   Sulfur  48.75 %  S
   Oxygen   3.04 %  O
          100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+3.8Pb0.2S8O
Help on Environment: Environment: In a carbonate-hosted deposit.
Help on IMA Status: IMA Status: Approved IMA 1995 (Dana # Added)
Help on Locality: Locality: La Mallieue lead-zinc deposit, Engis, about 40 km southwest of Liege, Belgium. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Prof. Willy Viaene (1943-), Katholieke Universiteit Leuven, Belgium.
Help on Name Pronunciation: Name Pronunciation: Viaeneite + Pronunciation Say VIAENEITE
Help on Synonym: Synonym: IMA1993-051

Viaeneite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3347:1:0.9009
Help on Cell Dimensions: Cell Dimensions: a = 9.717, b = 7.28, c = 6.559, Z = 2; beta = 95° V = 462.22 Den(Calc)= 3.78
Help on Crystal System: Crystal System: Monoclinic
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.709(1), 1.758(0.8), 2.419(0.8),2.323(0.7),

Physical Properties of Viaeneite

Help on Cleavage: Cleavage: {110} Good
Help on Color: Color: Yellow.
Help on Density: Density: 3.7 - 3.9, Average = 3.8
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3.5-4.5 - Between Copper Penny and Fluorite-Apatite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Viaeneite

Help on RL Anisotrophism: RL Anisotrophism: Ver strong in orange, yellow orange, gray with green hue.
Help on RL Bireflectance: RL Bireflectance: Distinct.
Help on RL Color: RL Color: Yellow with a brassy hue.
Help on RL Pleochroism: RL Pleochroism: Distinct, grayish brown, orange, yellow-orange.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Viaeneite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   19.50   32.90 
 550 nm   23.80   36.80 
 590 nm   24.60   37.40 
 650 nm   25.10   37.30 
Standardized Intensity (100%) Reflection Spectra of Viaeneite in Oil
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   11.70   17.60 
 550 nm   14.80   21.60 
 590 nm   15.30   21.90 
 650 nm   14.90   20.60 
Calculated Relative Intensity Colors of Viaeneite in Air
   0%   50% 100% 150% 200% 250% 300% 350% 400% 450%
Calculated Relative Intensity Colors of Viaeneite in Oil
   0%   80% 100% 160% 240% 320% 400% 480% 560% 640% 720% 750%

Calculated Properties of Viaeneite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.61 gm/cc
note: Specific Gravity of Viaeneite =3.78 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEViaeneite = 141.59 barns/electron
U=PEViaeneite x rElectron Density= 511.02 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Viaeneite is Not Radioactive

Viaeneite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.13.04)Dana Group Viaeneite! (Fe,Pb)4S8O Mono
Help on  Strunz Class: Strunz Class: 02.FD.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O
  02.FD -With O, OH, H2O
02.FD.10 Viaeneite! (Fe,Pb)4S8O Mono

Other Viaeneite Information

Help on References: References: NAME( MinRec, Vol. 28, No. 3) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(MinRec, v 28, p 224)
Help on See Also: See Also: Links to other databases for Viaeneite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 02.FD.10





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