Mineralogy Database

Tarkianite Mineral Data

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General Tarkianite Information

Help on Chemical  Formula: Chemical Formula: (Cu,Fe)(Re,Mo)4S8
Help on Composition: Composition: Molecular Weight = 952.63 gm
   Iron         0.59 %  Fe
   Copper       5.67 %  Cu
   Rhenium     54.73 %  Re
   Molybdenum  12.09 %  Mo
   Sulfur      26.93 %  S
              ______ 
              100.00 % 
Help on Empirical Formula: Empirical Formula: Cu0.85Fe2+0.1Re2.8Mo1.2S8
Help on Environment: Environment: Mineral grain in sulfide concentrate.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Hitura Ni-Cu-PGE mine, Nivala, western central Finland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Professor Mahmud Tarkian (1941-), of the University of Hamburg, Germany, for his contributions to ore mineralogy.
Help on Synonym: Synonym: IMA2003-004
 

Tarkianite Image

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  Tarkianite

Comments: A euhedral grain of tarkianite associated with sperrylite (Sp) in heavy-mineral concentrate. Plane-polarized light, oil immersion, sample 2_72_6.
Location: Sulfide concentrate from Hitura Ni-Cu-PGE mine, Nivala, western central Finland. Scale: See Scale Bar.
© Canadian Mineralogist

Tarkianite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 9.563, Z = 4; V = 874.55 Den(Calc)= 7.23
Help on Crystal System: Crystal System: Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: F43m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.521(1)(111), 1.841(0.9)(511), 2.389(0.9)(400),2.885(0.9)(311), 1.69(0.8)(440), 2.194(0.7)(331), 1.952(0.6)(422), 2.765(0.3)(222), 4.783(0.2)(200),
 

Physical Properties of Tarkianite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Irregular - Very brittle fracture producing irregular fragments
Help on Habit: Habit: Equant Grains - Granular material with equel dimensions in x, y, and z.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Tarkianite

Help on RL Anisotrophism: RL Anisotrophism: Absent.
Help on RL Bireflectance: RL Bireflectance: None.
Help on RL Color: RL Color: Light gray in air, slightly brown in oil.
Help on RL Pleochroism: RL Pleochroism: Absent.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Tarkianite in Air
λ R  ∑ R(λ) 
 400 nm   36.55   
 420 nm   36.82 
 440 nm   37.13 
 460 nm   37.80 
 470 nm   38.02 
 480 nm   38.24 
 500 nm   38.41 
 520 nm   38.61 
 540 nm   38.72 
 546 nm   38.87 
 560 nm   39.03 
 580 nm   39.13 
 589 nm   39.18 
 600 nm   39.24 
 620 nm   39.20 
 640 nm   39.21 
 650 nm   39.30 
 660 nm   39.30 
 680 nm   39.42 
 700 nm   39.49 
Standardized Intensity (100%) Reflection Spectra of Tarkianite in Oil
λ R  ∑ R(λ) 
 400 nm   19.65   
 420 nm   20.12 
 440 nm   20.19 
 460 nm   20.80 
 470 nm   20.91 
 480 nm   21.02 
 500 nm   21.39 
 520 nm   21.65 
 540 nm   21.72 
 546 nm   21.76 
 560 nm   21.81 
 580 nm   21.88 
 589 nm   21.84 
 600 nm   21.80 
 620 nm   21.95 
 640 nm   21.98 
 650 nm   22.12 
 660 nm   22.26 
 680 nm   22.39 
 700 nm   22.36 
Calculated Relative Intensity Colors of Tarkianite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240%
R                    
Calculated Relative Intensity Colors of Tarkianite in Oil
Relative
Intensity
   0%   50% 100% 150% 200% 250% 300% 350% 400% 430%
R                    
 

Calculated Properties of Tarkianite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.31 gm/cc
note: Specific Gravity of Tarkianite =7.23 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PETarkianite = 736.38 barns/electron
U=PETarkianite x relectron=4,645.93 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 23,197.45 (Gamma Ray American Petroleum Institute Units)
Concentration of Tarkianite per GRapi unit = 43.11 (PPM)

Tarkianite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Tarkianite - weak
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Bequerols
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 6.42 cm 558,249 1.51E-05 23,197.45 7.63
100 gm / 2.98 cm 55,825 1.51E-06 2,319.74 0.76
10 gm / 1.38 cm 5,582 1.51E-07 231.97 0.08
1 gm / 6.42 mm 558 1.51E-08 23.20 0.01
0.1 gm / 2.98 mm 56 1.51E-09 2.32 0.00
0.01 gm / 1.38 mm 6 1.51E-10 0.23 0.00
0.001 gm / 0.64 mm 1 1.51E-11 0.02 0.00

Weight of pure Tarkianite in grams (gm) and Calculated Diameter of a Sphere with a Density of 7.23 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
 

Tarkianite Classification

Help on  Dana Class: Dana Class: 02.10.05.01 (02)Sulfides - Including Selenides and Tellurides
  (02.10)where Am Bn Xp, with (m+n):p=3:4
  (02.10.05)Dana Group
 
02.10.05.01 Tarkianite! (Cu,Fe)(Re,Mo)4S8 F43m 4 3m
Help on  Strunz Class: Strunz Class: 02.DB.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.D - Metal Sulfides, M:S = 3:4 and 2:3
  02.DB -M:S = 2:3 and similar
 
02.DB.30 Tarkianite! (Cu,Fe)(Re,Mo)4S8 F43m 4 3m
 

Other Tarkianite Information

Help on References: References: NAME( CanMin, v 42, p 539) PHYS. PROP.(CanMin, v 42, p 539) OPTIC PROP.(CanMin, v 42, p 539)
Help on See Also: See Also: Links to other databases for Tarkianite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Tarkianite

(Cu,Fe)(Re,Mo)4S8
Dana No: 02.10.05.01 Strunz No: 02.DB.30
Locality:

 

Notes:

 

 
   
 


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