Mineralogy Database

Cernyite Mineral Data

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General Cernyite Information

Help on Chemical Formula: Chemical Formula: Cu2CdSnS4
Help on Composition: Composition: Molecular Weight = 486.48 gm
   Cadmium  23.11 %  Cd
   Copper   26.12 %  Cu
   Tin      24.40 %  Sn
   Sulfur   26.37 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu2CdSnS4
Help on Environment: Environment: A rare constituent of complex zoned pegmatites, as a component of a very minor sulfide mineral suite.
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: In the Hugo pegmatite, 1.6 km south of Keystone. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Dr. Cerny, mineralogist at the University of Manitoba, Winnipeg, Canada.
Help on Synonym: Synonym: ICSD 200421
  IMA1976-057
  PDF 29-537
 

Cernyite Image

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  Cernyite

Comments: Gray massive, metallic cernyite.
Location: Hugo Mine, Keystone, Keystone District, Pennington County, South Dakota, USA. Scale: See Image.
© Rruff Database

Cernyite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.95673
Help on Cell Dimensions: Cell Dimensions: a = 5.533, c = 10.8266, Z = 2; V = 331.45 Den(Calc)= 4.87
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): 3.167(1), 1.939(0.7), 1.662(0.5),
 

Physical Properties of Cernyite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray, Steel gray.
Help on Density: Density: 4.776
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Cernyite

Help on RL Anisotrophism: RL Anisotrophism: Very weak in shades of gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Cernyite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   24.60   25.50 
   
 546 nm   23.40   25.60 
 589 nm   22.30   25.00 
 650 nm   22.70   24.30 
Calculated Relative Intensity Colors of Cernyite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360% 390%
R1                        
R2                        
 

Calculated Properties of Cernyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Cernyite =4.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PECernyite = 149.51 barns/electron
U=PECernyite x rElectron Density= 658.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cernyite is Not Radioactive
 

Cernyite Classification
Help on Dana Class: Dana Class: 02.09.02.02 (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 Cernyite 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 Cernyite :
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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Cernyite

Cu2CdSnS4
Dana No: 02.09.02.02 Strunz No: 02.CB.15a
Locality:

 

Notes:

 
 
   
 

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