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Talnakhite Mineral Data
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General Talnakhite Information
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 Chemical Formula: |
Cu9(Fe,Ni)8S16 |
| Composition: |
Molecular Weight = 1,537.43 gm |
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Iron 21.79 % Fe |
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Copper 37.20 % Cu |
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Nickel 7.63 % Ni |
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Sulfur 33.37 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu9Fe2+6Ni2S16 |
| Environment: |
In concentrations of up to 70% in hydrothermal vein ores. |
| IMA Status: |
Approved IMA 1968 |
| Locality: |
Talnakh area, Taimyr Peninsula, Noril'sk region, Yakutiya, western Siberia, Russia Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Name Pronunciation: |
Talnakhite + Pronunciation  |
| Synonym: |
ICSD 15242 |
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PDF 25-287 |
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Talnakhite Image |
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Images:
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Images:
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Parkerite Talnakhite
Comments: Cut, not polished section showing rounded grains of parkerite (yellow arrow) in 'dactiloscopyc' galena aggregate in talnakhite-chalcopyrite ore. Talnakhite is bronze-violet slightly oxidised grain streaked with golden chalcopyrite.
Location: Taimyr (Oktyabr'skoye; Oktyabr'sky) Cu-Ni deposit, Noril'sk, Putoran Plateau, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia.
Scale: Picture Size 4x3 mm.
© Pavel M. Kartashov |
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Talnakhite Crystallography
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| Cell Dimensions: |
a = 10.64, Z = 2; V = 1,204.55 Den(Calc)= 4.24 |
| Crystal System: |
Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: I 43m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.043(1), 1.879(0.9), 1.598(0.7), |
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Physical Properties of Talnakhite
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| Color: |
Yellow, Tarnish pink, Tarnish brown. |
| Density: |
4.29 |
| Diaphaneity: |
Opaque |
| Habit: |
Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape. |
| Hardness: |
4-4.5 - Between Fluorite and Apatite |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Talnakhite
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| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Talnakhite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
13.00 |
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| 420 nm |
17.10 |
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| 440 nm |
21.20 |
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| 460 nm |
26.20 |
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| 480 nm |
30.60 |
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| 500 nm |
34.10 |
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| 520 nm |
37.00 |
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| 540 nm |
39.40 |
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| 560 nm |
40.80 |
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| 580 nm |
41.70 |
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| 600 nm |
42.30 |
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| 620 nm |
42.80 |
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| 640 nm |
43.00 |
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| 660 nm |
43.20 |
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| 680 nm |
43.30 |
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| 700 nm |
43.40 |
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Calculated Relative Intensity Colors of Talnakhite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
360% |
380% |
| R |
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Calculated Properties of Talnakhite
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| Electron Density: |
Bulk Density (Electron Density)=4.02 gm/cc
note: Specific Gravity of Talnakhite =4.24 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0079860783
Boson Index = 0.9920139217 |
| Photoelectric: |
PETalnakhite = 28.11 barns/electron
U=PETalnakhite x rElectron Density= 113.05 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Talnakhite is Not Radioactive |
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Talnakhite Classification
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| Dana Class: |
02.09.08.01 (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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(02.09.08)Talnakhite Group |
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02.09.08.01 Talnakhite Cu9(Fe,Ni)8S16 I 43m 4 3m |
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02.09.08.02 Haycockite Cu4Fe5S8 P 222 2 2 2 |
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02.09.08.03 Mooihoekite Cu9Fe9S16 P 42m- 4 2m |
| Strunz Class: |
02.CB.10b 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.10b Haycockite Cu4Fe5S8 P 222 2 2 2 |
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02.CB.10b Mooihoekite Cu9Fe9S16 P 42m- 4 2m |
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02.CB.10b Putoranite Cu1.1Fe1.2S2 P n3n 4/m 3 2/m |
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02.CB.10b Talnakhite Cu9(Fe,Ni)8S16 I 43m 4 3m |
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Other Talnakhite 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 Talnakhite :
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 Talnakhite Specimen Label here :
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Talnakhite
Cu9(Fe,Ni)8S16
Dana No: 02.09.08.01 Strunz No: 02.CB.10b
Locality:
Notes:
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