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Chatkalite Mineral Data
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General Chatkalite Information
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 Chemical Formula: |
Cu6Fe++Sn2S8 |
| Composition: |
Molecular Weight = 931.07 gm |
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Iron 6.00 % Fe |
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Copper 40.95 % Cu |
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Tin 25.50 % Sn |
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Sulfur 27.55 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu6Fe2+Sn2S8 |
| Environment: |
As rounded disseminations in tetrahedite, from a sulfide-bearing quartz vein. |
| IMA Status: |
Approved IMA 1981 |
| Locality: |
From an unspecified locality in the Chatkalo-Kuramin Mountains, eastern Uzbekistan, USSR. Link to MinDat.org Location Data. |
| Name Origin: |
For the occurrence in the Chatkalo-Kuramin Mountains, USSR. |
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Chatkalite Crystallography
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| Axial Ratios: |
a:c = 1:0.70604 |
| Cell Dimensions: |
a = 7.61, c = 5.373, Z = 1; V = 311.16 Den(Calc)= 4.97 |
| Crystal System: |
Tetragonal - Scalenohedral H-M Symbol (4 2m) Space Group: P 4m2 |
| X Ray Diffraction: |
By Intensity(I/Io): 1.904(1), 3.11(0.8), 1.625(0.4), |
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Physical Properties of Chatkalite
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| Color: |
Rose, Brown orange. |
| Density: |
5 |
| Diaphaneity: |
Opaque |
| Hardness: |
4.5 - Between Fluorite and Apatite |
| Luster: |
Metallic |
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Optical Properties of Chatkalite
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| RL Anisotrophism: |
Weak in shades of brown. |
| RL Color: |
Pale rose. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Chatkalite in Air
| λ |
R1 |
R2 |
 |
∑ R1(λ) |
∑ R2(λ) |
| 440 nm |
24.40 |
25.00 |
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| 460 nm |
25.00 |
25.60 |
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| 480 nm |
25.60 |
26.20 |
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| 500 nm |
26.20 |
26.70 |
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| 520 nm |
26.70 |
27.20 |
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| 540 nm |
27.20 |
27.60 |
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| 560 nm |
27.60 |
28.10 |
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| 580 nm |
27.90 |
28.60 |
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| 600 nm |
28.30 |
29.00 |
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| 620 nm |
28.50 |
29.30 |
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| 640 nm |
28.60 |
29.40 |
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| 660 nm |
28.60 |
29.50 |
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| 680 nm |
28.40 |
29.30 |
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| 700 nm |
27.90 |
28.60 |
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Calculated Relative Intensity Colors of Chatkalite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
350% |
| R1 |
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| R2 |
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Calculated Properties of Chatkalite
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| Electron Density: |
Bulk Density (Electron Density)=4.57 gm/cc
note: Specific Gravity of Chatkalite =4.97 gm/cc.
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| Fermion Index: |
Fermion Index = 0.04
Boson Index = 0.96 |
| Photoelectric: |
PEChatkalite = 98.54 barns/electron
U=PEChatkalite x rElectron Density= 450.26 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chatkalite is Not Radioactive |
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Chatkalite Classification
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| Dana Class: |
02.09.03.02 (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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(02.09.03)Mawsonite Group |
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02.09.03.01 Mawsonite Cu6Fe2SnS8 P 4m2 4 2m |
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02.09.03.02 Chatkalite Cu6FeSn2S8 P 4m2 4 2m |
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02.09.03.03 Stannoidite Cu8Fe3Sn2S12 I 222 2 2 2 |
| Strunz Class: |
02.CB.20 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.20 Chatkalite Cu6FeSn2S8 P 4m2 4 2m |
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02.CB.20 Mawsonite Cu6Fe2SnS8 P 4m2 4 2m |
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Other Chatkalite 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 Chatkalite :
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
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Print or Cut-and-Paste your Chatkalite Specimen Label here :
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Chatkalite
Cu6Fe++Sn2S8
Dana No: 02.09.03.02 Strunz No: 02.CB.20
Locality:
Notes:
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