Stephanite Mineral Data + Say STEPHANITE


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General Stephanite Information
Help on Chemical Formula: Chemical Formula: Ag5SbS4
Help on Composition: Composition: Molecular Weight = 789.36 gm
   Silver    68.33 %  Ag
   Antimony  15.42 %  Sb
   Sulfur    16.25 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Ag5SbS4
Help on Environment: Environment: A late-stage mineral in hydrothermal silver deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1845
Help on Locality: Locality: Freiberg, Sachsen (Saxony), Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Archduke Victor Stephan (1817-1867). Former Austrian Mining Director and engineer,
Help on Synonym: Synonym: Brittle Silver Ore
  ICSD 16987
  PDF 11-108
 

Stephanite Image

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Stephanite

Comments: Group of steel gray lustrous stephanite crystals to 8 mm in diameter. Caleb Simkoff Collection.
Location: Freiberg, Saxony, Germany. Scale: 10 x 12 x 23 mm.
© Dan Weinrich
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Stephanite   Silver

Comments: Thick, ropy, native silver wires with blocky, well-crystallized stephanite on white and tan calcite matrix.
Location: Freiberg, Erzgebirge, Saxony, Alemania, Germay. Scale: Picture size 3 cm.
© Fabre Minerals

Stephanite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.6338:1:0.6918
Help on Cell Dimensions: Cell Dimensions: a = 7.793, b = 12.295, c = 8.506, Z = 4; V = 815.00 Den(Calc)= 6.43
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: C mc21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.08(1), 2.58(0.9), 2.89(0.6),
Help on Forms: Forms:

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Forms: [ 0 1 0] [ 0 2 1] [ 1 1 0] [ 1 1 1] [ 0 0 1]

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Click Here for Large Stephanite Structure Window Crystal Structure:

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Ribar B , Nowacki W , Acta Crystallographica, Section B , 26 (1970) p.201-207, Die kristallstruktur von stephanit, [SbS3|S|Ag5]

 

Physical Properties of Stephanite

Help on Cleavage: Cleavage: [010] Imperfect, [021] Poor
Help on Color: Color: Lead gray, Black.
Help on Density: Density: 6.2 - 6.3, Average = 6.25
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luminescence: Luminescence: None.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: black
 

Optical Properties of Stephanite

Help on RL Anisotrophism: RL Anisotrophism: Strong, in vivid colors.
Help on RL Color: RL Color: White-gray.
Help on RL Pleochroism: RL Pleochroism: Very weak, white to pink-white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Stephanite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   31.00   31.80 
   
 420 nm   30.80   31.60 
 440 nm   30.60   31.40 
 460 nm   30.20   31.10 
 480 nm   29.70   30.80 
 500 nm   29.00   30.30 
 520 nm   28.20   29.70 
 540 nm   27.60   29.00 
 560 nm   27.00   28.50 
 580 nm   26.50   28.10 
 600 nm   26.20   28.00 
 620 nm   26.10   27.90 
 640 nm   26.00   27.80 
 660 nm   26.00   27.60 
 680 nm   26.20   27.40 
 700 nm   26.60   27.00 
Calculated Relative Intensity Colors of Stephanite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 330%
R1                      
R2                      
 

Calculated Properties of Stephanite

Help on Electron Density: Electron Density:

relectron=5.70 gm/cc
note: rStephanite =6.43 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00121
Boson Index = 0.99879
Help on Photoelectric: Photoelectric:

PEStephanite = 227.71 barns/electron
U=PEStephanite x relectron=1,298.42 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stephanite is Not Radioactive
 

Stephanite Classification
Help on Dana Class: Dana Class: 3.2.4.1 (3)Sulfides - Sulfosalts
  (3.2)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.2.4)Dana Group
 
3.2.4.1 Stephanite Ag5SbS4 C mc21 mm2
 
3.2.4.2 Selenostephanite Ag5Sb(Se,S)4 P 212121 2 2 2
Help on Strunz Class: Strunz Class: II/E.06-10 II - Sulfides and sulphosalts
  II/E - Sulfosalts (S : As,Sb,Bi = x) Sulfosalts with predominant Silver, x = 6.0 - 1.6
  II/E.06 - Stefanite - Arcusbisite series
 
II/E.06-10 Stephanite Ag5SbS4 C mc21 mm2
 
II/E.06-20 Selenostephanite Ag5Sb(Se,S)4 P 212121 2 2 2
 
II/E.06-30 Arcubisite Ag6CuBiS4 Ortho ? Ortho
 
II/E.06-40 Fettelite! Ag24HgAs5S20 P 312, P 3m1 or P 3m1 Trig
 

Other Stephanite 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 Stephanite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - Crocoite.com Mineral Locations 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 - HyperPhysics 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 - Minerals of Wisconsin 15 -QUT Mineral Atlas 16 - WWW-MINCRYST 17 -École des Mines de Paris

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Stephanite

Ag5SbS4
Dana No: 3.2.4.1 Strunz No: II/E.06-10
Locality:

 

Notes:

 
 
   
 
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