Mineralogy Database

Talnakhite Mineral Data

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General Talnakhite Information

Help on Chemical  Formula: Chemical Formula: Cu9(Fe,Ni)8S16
Help on Composition: Composition: Molecular Weight = 1,537.43 gm
   Iron    21.79 %  Fe
   Copper  37.20 %  Cu
   Nickel   7.63 %  Ni
   Sulfur  33.37 %  S
          100.00 % 
Help on Empirical Formula: Empirical Formula: Cu9Fe2+6Ni2S16
Help on Environment: Environment: In concentrations of up to 70% in hydrothermal vein ores.
Help on IMA Status: IMA Status: Approved IMA 1968
Help on Locality: Locality: Talnakh area, Taimyr Peninsula, Noril'sk region, Yakutiya, western Siberia, Russia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Talnakhite + Pronunciation Say TALNAKHITE
Help on Synonym: Synonym: ICSD 15242
  PDF 25-287

Talnakhite Image

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Comments: Tarnished brown talnakhite with brassy chalcopyrite.
Location: Talnakh Deposit, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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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

Talnakhite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.64, Z = 2; V = 1,204.55 Den(Calc)= 4.24
Help on Crystal System: Crystal System: Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: I 43m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.043(1), 1.879(0.9), 1.598(0.7),

Physical Properties of Talnakhite

Help on Color: Color: Yellow, Tarnish pink, Tarnish brown.
Help on Density: Density: 4.29
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Optical Properties of Talnakhite

Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Talnakhite in Air
λ R  ∑ R(λ) 
 400 nm   13.00   
 420 nm   17.10 
 440 nm   21.20 
 460 nm   26.20 
 480 nm   30.60 
 500 nm   34.10 
 520 nm   37.00 
 540 nm   39.40 
 560 nm   40.80 
 580 nm   41.70 
 600 nm   42.30 
 620 nm   42.80 
 640 nm   43.00 
 660 nm   43.20 
 680 nm   43.30 
 700 nm   43.40 
Calculated Relative Intensity Colors of Talnakhite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 360% 380%

Calculated Properties of Talnakhite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.02 gm/cc
note: Specific Gravity of Talnakhite =4.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0079860783
Boson Index = 0.9920139217
Help on Photoelectric: Photoelectric: PETalnakhite = 28.11 barns/electron
U=PETalnakhite x rElectron Density= 113.05 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Talnakhite is Not Radioactive

Talnakhite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.09)where Am Bn Xp, with (m+n):p=1:1
  (02.09.08)Talnakhite Group Talnakhite Cu9(Fe,Ni)8S16 I 43m 4 3m Haycockite Cu4Fe5S8 P 222 2 2 2 Mooihoekite Cu9Fe9S16 P 42m- 4 2m
Help on  Strunz Class: Strunz Class: 02.CB.10b 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.10b Haycockite Cu4Fe5S8 P 222 2 2 2
02.CB.10b Mooihoekite Cu9Fe9S16 P 42m- 4 2m
02.CB.10b Putoranite Cu1.1Fe1.2S2 P n3n 4/m 3 2/m
02.CB.10b Talnakhite Cu9(Fe,Ni)8S16 I 43m 4 3m

Other Talnakhite 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 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

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Dana No: Strunz No: 02.CB.10b





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