Mineralogy Database

Stannoidite Mineral Data

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General Stannoidite Information

Help on Chemical  Formula: Chemical Formula: Cu8Fe3Sn2S12
Help on Composition: Composition: Molecular Weight = 1,298.12 gm
   Iron    12.91 %  Fe
   Copper  39.16 %  Cu
   Tin     18.29 %  Sn
   Sulfur  29.64 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Cu8Fe2+3Sn2S12
Help on Environment: Environment: In hydrothermal Cu-Sn deposits.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Konjo mine, Okayama Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its similarity to stannite.
Help on Name Pronunciation: Name Pronunciation: Stannoidite + Pronunciation Say STANNOIDITE
Help on Synonym: Synonym: ICSD 41894
  PDF 22-237
 

Stannoidite Image

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  Stannoidite

Comments: Polished section (PPL) image showing a rim of V-stannoidite on colusite (co) grain in massive bornite (bn).
Location: Kidd Creek Volcanogenic Massive Sulfide deposit, Western Abitibi Subprovince, Timmins, Ontario, Canada. Scale: Picture Size 0.25 mm.
© National Resouces of Canada

Stannoidite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.9925:1:2.9796
Help on Cell Dimensions: Cell Dimensions: a = 10.76, b = 5.4, c = 16.09, Z = 2; V = 934.89 Den(Calc)= 4.61
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: I 222
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.11(1), 1.906(0.7), 1.621(0.2),
 

Physical Properties of Stannoidite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brass brown.
Help on Density: Density: 4.29
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Metallic
Help on Streak: Streak: brown gray
 

Optical Properties of Stannoidite

Help on RL Anisotrophism: RL Anisotrophism: Strong, dark orange-red to yellow-gray.
Help on RL Color: RL Color: Pinkish brown.
Help on RL Pleochroism: RL Pleochroism: Distinct, light salmon-brown to brown.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Stannoidite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   19.50   20.40 
   
 420 nm   19.40   20.80 
 440 nm   19.30   21.20 
 460 nm   19.60   21.70 
 480 nm   20.30   22.40 
 500 nm   21.20   23.30 
 520 nm   22.20   24.20 
 540 nm   23.40   25.20 
 560 nm   24.60   26.30 
 580 nm   25.90   27.50 
 600 nm   27.10   28.70 
 620 nm   28.30   30.00 
 640 nm   29.50   31.20 
 660 nm   30.60   32.30 
 680 nm   31.70   33.40 
 700 nm   32.60   34.20 
Calculated Relative Intensity Colors of Stannoidite in Air
Relative
Intensity
   0%   50% 100% 150% 200% 250% 300% 350% 400% 450%
R1                    
R2                    
 

Calculated Properties of Stannoidite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.28 gm/cc
note: Specific Gravity of Stannoidite =4.61 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEStannoidite = 77.74 barns/electron
U=PEStannoidite x rElectron Density= 332.42 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stannoidite is Not Radioactive
 

Stannoidite Classification

Help on  Dana Class: Dana Class: 02.09.03.03 (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.03)Mawsonite Group
 
02.09.03.01 Mawsonite Cu6Fe2SnS8 P 4m2 4 2m
 
02.09.03.02 Chatkalite Cu6FeSn2S8 P 4m2 4 2m
 
02.09.03.03 Stannoidite Cu8Fe3Sn2S12 I 222 2 2 2
Help on  Strunz Class: Strunz Class: 02.CB.15c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.C - Metal Sulfides, M:S = 1:1 (and similar)
  02.CB -With Zn, Fe, Cu, Ag, Au, etc
 
02.CB.15c Stannoidite Cu8Fe3Sn2S12 I 222 2 2 2
 

Other Stannoidite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Stannoidite :
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
15 - WWW-MINCRYST

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Stannoidite

Cu8Fe3Sn2S12
Dana No: 02.09.03.03 Strunz No: 02.CB.15c
Locality:

 

Notes:

 

 
   
 


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