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Tarkianite

Formula:
(Cu,Fe)(Re,Mo)
 
4
S
 
8
System:IsometricColour:black
Hardness:5½ - 6
Name:For Professor Mahmud Tarkian (1941-), specialist of ore microscopy of the University of Hamburg, Germany, who first described the synthetic material and determined its structure.


A rhenium sulfide with a spinel-type structure.

Classification of Tarkianite

IMA status:Approved 2003
Strunz 8th edition ID:2/D.14-20
Nickel-Strunz 10th (pending) edition ID:2.DB.30

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
B : M:S = 2:3
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Type Occurrence of Tarkianite

Type Locality:Hitura Nickel Mine, Nivala, Oulun (Oulu) Lääni, Finland
General Appearance of Type Material:microscopic grains to 0.1 mm across, included in pentlandite and pyrrhotite
Associated Minerals at type locality:
ValleriiteSperrylitePyrrhotitePentlanditeMichenerite
MackinawiteIrarsiteHollingworthiteFrooditeCubanite
ChromiteChalcopyrite

Physical Properties of Tarkianite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:black
Streak:black
Hardness (Mohs):5½ - 6
Tenacity:Brittle
Density (calculated):7.3 g/cm3

Crystallography of Tarkianite

Crystal System:Isometric
Class (H-M):4 3m - Hextetrahedral
Cell Parameters:a = 9.563Å
Unit Cell Volume:V 874.55 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
5.53 (100)
2.88 (90)

Chemical Properties of Tarkianite

Formula:
(Cu,Fe)(Re,Mo)
 
4
S
 
8
Essential elements:
All elements listed in formula:Cu, Fe, Mo, Re, S

Relationship of Tarkianite to other Species

Related Minerals - Nickel-Strunz Grouping):
2.DB.05Antimonselite
Sb
 
2
Se
 
3
2.DB.05Bismuthinite
Bi
 
2
S
 
3
2.DB.05Guanajuatite
Bi
 
2
(Se,S)
 
3
2.DB.05Metastibnite
Sb
 
2
S
 
3
2.DB.05Pääkkönenite
Sb
 
2
AsS
 
2
2.DB.05Stibnite
Sb
 
2
S
 
3
2.DB.10Ottemannite
beta Sn
 
2
S
 
3
2.DB.10Suredaite
PbSnS
 
3
2.DB.15Bowieite
(Rh,Ir,Pt)
 
2
S
 
3
2.DB.15Kashinite
(Ir,Rh)
 
2
S
 
3
2.DB.20Montbrayite
(Au,Sb)
 
2
Te
 
3
2.DB.25Edgarite
FeNb
 
3
S
 
6
2.DB.35Cameronite
AgCu
 
7
Te
 
10

Other Names for Tarkianite

Synonyms:
IMA2003-004
German names:
Tarkianit

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Tarkianite

Reference List:Kojonen, K.K. et al. (2004), Canadian Mineralogist: 42: 539-544.

Internet Links for Tarkianite

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    Localities for Tarkianite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Ontario
      • Thunder Bay District
        • Marathon
    		K.K. Kojonen et al.: Can. Mineral. 42:539-544 (2004)
    Finland
     
    • Etelä-Suomen Lääni
    		K.K. Kojonen et al.: Can. Mineral. 42:539-544 (2004)
    • Oulun (Oulu) Lääni
      • Nivala
    		K.K. Kojonen et al.: Can. Mineral. 42:539-544 (2004)
    Russia
     
    • Northern Region
      • Karelia Republic
        • Oulanka plutonic complex
          • Olanga (Oulanka) River
    		K.K. Kojonen et al.: Can. Mineral. 42:539-544 (2004)
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Monche-Tundra
            • Monchegorsk
    		K.K. Kojonen et al.: Can. Mineral. 42:539-544 (2004)
    USA
     
    • Montana
      • Stillwater Co.
    		Kojonen, K.K., Roberts, A.C., Isomäki, O.-P., Knauf, V.V., Johanson, Bo, Pakkanen, L. (2004): Tarkianite, (Cu,Fe)(Re,Mo)4S8, a new mineral species from the Hitura mine, Nivala, Finland. The Canadian Mineralogist, 42, 539-544
    Mineral and/or Locality
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