Mineralogy Database

Duranusite Mineral Data

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General Duranusite Information

Help on Chemical  Formula: Chemical Formula: As4S
Help on Composition: Composition: Molecular Weight = 331.75 gm
   Arsenic  90.33 %  As
   Sulfur    9.67 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: As4S
Help on Environment: Environment: Realgar has been altered by deuteric solutions to form the rare mineral duranusite,
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: Duranus, Alpes-Meritimes, France. Mina Capillitas, an epithermal deposit in the Province of Catamarca, Argentina. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Duranusite + Pronunciation Say DURANUSITE

Duranusite Image

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  Duranusite   Realgar

Comments: Small black Duranusite in orange-red realgar matrix.
Location: Duranus, Alpes-Maritimes, Provence-Alpes-CÃīte d'Azur, France. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Duranusite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.529:1:1.4904
Help on Cell Dimensions: Cell Dimensions: a = 3.576, b = 6.759, c = 10.074, Z = 2; V = 243.49 Den(Calc)= 4.52
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.919(1), 5.037(0.9), 5.62(0.9),

Physical Properties of Duranusite

Help on Color: Color: Red.
Help on Density: Density: 4.5
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Duranusite

Help on RL Color: RL Color: Gray-white with a brownish tint and brownish red internal reflections.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Duranusite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   39.00   42.00 
 420 nm   36.80   39.40 
 440 nm   34.60   36.80 
 460 nm   33.00   34.80 
 480 nm   32.10   33.60 
 500 nm   31.40   32.70 
 520 nm   30.80   32.20 
 540 nm   30.40   31.80 
 560 nm   30.00   31.50 
 580 nm   29.60   31.00 
 600 nm   29.10   30.60 
 620 nm   28.70   30.30 
 640 nm   28.40   30.00 
 660 nm   28.00   29.70 
 680 nm   27.60   29.30 
 700 nm   27.10   29.00 
Calculated Relative Intensity Colors of Duranusite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 300%

Calculated Properties of Duranusite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.03 gm/cc
note: Specific Gravity of Duranusite =4.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0007249232
Boson Index = 0.9992750768
Help on Photoelectric: Photoelectric: PEDuranusite = 65.88 barns/electron
U=PEDuranusite x rElectron Density= 265.70 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Duranusite is Not Radioactive

Duranusite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.01)where Am Xp, with m:p>3:1
  (02.01.04)Dana Group Duranusite As4S Unk Ortho
Help on  Strunz Class: Strunz Class: 02.FA.05 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.FA -With As, (Sb), S
02.FA.05 Duranusite As4S Unk Ortho

Other Duranusite Information

Help on References: References: NAME( CanMin, 10/99) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Duranusite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 02.FA.05





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