Mineralogy Database

Selenostephanite Mineral Data

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General Selenostephanite Information

Help on Chemical  Formula: Chemical Formula: Ag5Sb(Se,S)4
Help on Composition: Composition: Molecular Weight = 930.04 gm
   Silver    57.99 %  Ag
   Antimony  13.09 %  Sb
   Selenium  25.47 %  Se
   Sulfur     3.45 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Ag5SbSe3S
Help on Environment: Environment: In quartz and orthclase-quartz veins with other silver minerals.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Unidentified locality in central Chukhotka, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition and similarity to stephanite.
Help on Name Pronunciation: Name Pronunciation: Selenostephanite + Pronunciation Say SELENOSTEPHANITE

Selenostephanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6638:1:0.7533
Help on Cell Dimensions: Cell Dimensions: a = 7.86, b = 11.84, c = 8.92, Z = 4; V = 830.12 Den(Calc)= 7.44
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 212121
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.96(1), 2.28(0.9), 2.64(0.9),

Physical Properties of Selenostephanite

Help on Color: Color: Lead gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Metallic

Optical Properties of Selenostephanite

Help on RL Anisotrophism: RL Anisotrophism: Brownish gray to gray.
Help on RL Color: RL Color: Grayish white with olive tint.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Selenostephanite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 420 nm   33.30   34.80 
 520 nm   33.60   36.00 
 580 nm   32.60   34.80 
 640 nm   31.00   33.00 
 700 nm   30.40   32.30 
Calculated Relative Intensity Colors of Selenostephanite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270% 280%

Calculated Properties of Selenostephanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.46 gm/cc
note: Specific Gravity of Selenostephanite =7.44 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PESelenostephanite = 217.21 barns/electron
U=PESelenostephanite x rElectron Density=1,404.00 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Selenostephanite is Not Radioactive

Selenostephanite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.02)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.02.04)Stephanite Series Stephanite Ag5SbS4 C mc21 mm2 Selenostephanite Ag5Sb(Se,S)4 P 212121 2 2 2
Help on  Strunz Class: Strunz Class: 02.GB.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.G - Sulfarsenites, sulfantimonites, sulfbismuthites
  02.GB -Neso-sulfarsenites, etc
02.GB.10 Selenostephanite Ag5Sb(Se,S)4 P 212121 2 2 2
02.GB.10 Stephanite Ag5SbS4 C mc21 mm2

Other Selenostephanite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Selenostephanite :
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.GB.10





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