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Cernyite Mineral Data
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General Cernyite Information
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 Chemical Formula: |
Cu2CdSnS4 |
| Composition: |
Molecular Weight = 486.48 gm |
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Cadmium 23.11 % Cd |
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Copper 26.12 % Cu |
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Tin 24.40 % Sn |
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Sulfur 26.37 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu2CdSnS4 |
| Environment: |
A rare constituent of complex zoned pegmatites, as a component of a very minor sulfide mineral suite. |
| IMA Status: |
Approved IMA 1978 |
| Locality: |
In the Hugo pegmatite, 1.6 km south of Keystone. Link to MinDat.org Location Data. |
| Name Origin: |
For Dr. Cerny, mineralogist at the University of Manitoba, Winnipeg, Canada. |
| Synonym: |
ICSD 200421 |
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IMA1976-057 |
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PDF 29-537 |
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Cernyite Image |
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Images:
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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 |
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Cernyite Crystallography
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| Axial Ratios: |
a:c = 1:1.95673 |
| Cell Dimensions: |
a = 5.533, c = 10.8266, Z = 2; V = 331.45 Den(Calc)= 4.87 |
| Crystal System: |
Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: I 42m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.167(1), 1.939(0.7), 1.662(0.5), |
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Physical Properties of Cernyite
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| Cleavage: |
None |
| Color: |
Gray, Steel gray. |
| Density: |
4.776 |
| Diaphaneity: |
Opaque |
| Hardness: |
4 - Fluorite |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Cernyite
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| RL Anisotrophism: |
Very weak in shades of gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Cernyite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 470 nm |
24.60 |
25.50 |
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| 546 nm |
23.40 |
25.60 |
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| 589 nm |
22.30 |
25.00 |
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| 650 nm |
22.70 |
24.30 |
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Calculated Relative Intensity Colors of Cernyite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
360% |
390% |
| R1 |
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| R2 |
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Calculated Properties of Cernyite
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| Electron Density: |
Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Cernyite =4.87 gm/cc.
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| Fermion Index: |
Fermion Index = 0.1
Boson Index = 0.9 |
| Photoelectric: |
PECernyite = 149.51 barns/electron
U=PECernyite x rElectron Density= 658.54 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Cernyite is Not Radioactive |
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Cernyite Classification
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| Dana Class: |
02.09.02.02 (02)Sulfides - Including Selenides and Tellurides |
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(02.09)where Am Bn Xp, with (m+n):p=1:1 |
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(02.09.02)Stannite Group (Tetragonal: I-42m) A2BCS type |
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02.09.02.01 Stannite Cu2FeSnS4 I 42m 4 2m |
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02.09.02.02 Cernyite Cu2CdSnS4 I 42m 4 2m |
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02.09.02.03 Briartite Cu2(Zn,Fe)GeS4 I 42m 4 2m |
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02.09.02.04 Kuramite Cu3SnS4 I 42m 4 2m |
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02.09.02.05 Sakuraiite (Cu,Zn,Fe,In,Sn)4S4 P 432, P 43m, or P m3m Cubic |
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02.09.02.06 Hocartite Ag2FeSnS4 I 42m 4 2m |
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02.09.02.07 Pirquitasite Ag2ZnSnS4 I 42m 4 2m |
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02.09.02.08 Velikite Cu2HgSnS4 I 42m 4 2m |
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02.09.02.09 Kesterite Cu2(Zn,Fe)SnS4 I 4 4 |
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02.09.02.10 Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m |
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02.09.02.11 Barquillite! Cu2CdGeS4 I 42m 4 2m |
| Strunz Class: |
02.CB.15a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.C - Metal Sulfides, M:S = 1:1 (and similar) |
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02.CB -With Zn, Fe, Cu, Ag, Au, etc |
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02.CB.15a Cernyite Cu2CdSnS4 I 42m 4 2m |
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02.CB.15a Ferrokesterite Cu2(Fe,Zn)SnS4 I 42m 4 2m |
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02.CB.15a Kesterite Cu2(Zn,Fe)SnS4 I 4 4 |
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02.CB.15a Hocartite Ag2FeSnS4 I 42m 4 2m |
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02.CB.15a Idaite Cu5FeS6 P 63/mmc 6/m 2/m 2/m |
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02.CB.15a Kuramite Cu3SnS4 I 42m 4 2m |
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02.CB.15a Pirquitasite Ag2ZnSnS4 I 42m 4 2m |
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02.CB.15a Stannite Cu2FeSnS4 I 42m 4 2m |
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02.CB.15a Velikite Cu2HgSnS4 I 42m 4 2m |
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Other Cernyite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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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