Mineralogy Database

Kuramite Mineral Data

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General Kuramite Information

Help on Chemical  Formula: Chemical Formula: Cu3SnS4
Help on Composition: Composition: Molecular Weight = 437.61 gm
   Copper  43.56 %  Cu
   Tin     27.13 %  Sn
   Sulfur  29.31 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Cu3SnS4
Help on Environment: Environment: In gold-sulfide-quartz veins, as inclusions in goldfieldite.
Help on IMA Status: IMA Status: Approved IMA 1979
Help on Locality: Locality: Kochbulak Au-Ag-Te deposit, Chatkal-Kuraminskii (Kuramin) Mountains, Angren Region, Tashkent District, Uzbekistan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Name for the locality.
Help on Name Pronunciation: Name Pronunciation: Kuramite Say KURAMITE
 

Kuramite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.97428
Help on Cell Dimensions: Cell Dimensions: a = 5.445, c = 10.75, Z = 2; V = 318.72 Den(Calc)= 4.56
Help on Crystal System: Crystal System: Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.13(1), 1.914(0.8), 1.64(0.6),
 

Physical Properties of Kuramite

Help on Color: Color: Gray, Steel gray.
Help on Density: Density: 4.56
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Metallic
 

Optical Properties of Kuramite

Help on RL Anisotrophism: RL Anisotrophism: Distinct, in shades of brown.
Help on RL Color: RL Color: Neutral gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Kuramite in Air
λ R  ∑ R(λ) 
 440 nm   25.20   
 460 nm   25.30 
 480 nm   25.50 
 500 nm   26.00 
 520 nm   26.30 
 540 nm   26.50 
 560 nm   26.60 
 580 nm   26.70 
 600 nm   26.80 
 620 nm   26.70 
 640 nm   26.50 
 660 nm   26.40 
 680 nm   26.40 
 700 nm   26.30 
Calculated Relative Intensity Colors of Kuramite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 350%
R                      
 

Calculated Properties of Kuramite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.19 gm/cc
note: Specific Gravity of Kuramite =4.56 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEKuramite = 102.91 barns/electron
U=PEKuramite x rElectron Density= 431.07 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kuramite is Not Radioactive
 

Kuramite Classification

Help on  Dana Class: Dana Class: 02.09.02.04 (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.02)Stannite Group (Tetragonal: I-42m) A2BCS type
 
02.09.02.01 Stannite Cu2FeSnS4 I 42m 4 2m
 
02.09.02.02 Cernyite Cu2CdSnS4 I 42m 4 2m
 
02.09.02.03 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m
 
02.09.02.04 Kuramite Cu3SnS4 I 42m 4 2m
 
02.09.02.05 Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 432, P 43m, or P m3m Cubic
 
02.09.02.06 Hocartite Ag2FeSnS4 I 42m 4 2m
 
02.09.02.07 Pirquitasite Ag2ZnSnS4 I 42m 4 2m
 
02.09.02.08 Velikite Cu2HgSnS4 I 42m 4 2m
 
02.09.02.09 Kesterite Cu2(Zn,Fe)SnS4 I 4 4
 
02.09.02.10 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m
 
02.09.02.11 Barquillite! Cu2CdGeS4 I 42m 4 2m
Help on  Strunz Class: Strunz Class: 02.CB.15a 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.15a Cernyite Cu2CdSnS4 I 42m 4 2m
 
02.CB.15a Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m
 
02.CB.15a Kesterite Cu2(Zn,Fe)SnS4 I 4 4
 
02.CB.15a Hocartite Ag2FeSnS4 I 42m 4 2m
 
02.CB.15a Idaite Cu5FeS6 P 63/mmc 6/m 2/m 2/m
 
02.CB.15a Kuramite Cu3SnS4 I 42m 4 2m
 
02.CB.15a Pirquitasite Ag2ZnSnS4 I 42m 4 2m
 
02.CB.15a Stannite Cu2FeSnS4 I 42m 4 2m
 
02.CB.15a Velikite Cu2HgSnS4 I 42m 4 2m
 

Other Kuramite 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 Kuramite :
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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Print or Cut-and-Paste your Kuramite Specimen Label here :

Kuramite

Cu3SnS4
Dana No: 02.09.02.04 Strunz No: 02.CB.15a
Locality:

 

Notes:

 

 
   
 


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