Tarkianite
A valid IMA mineral species
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Formula:
(Cu,Fe)(Re,Mo)4S8
Colour:
black
Lustre:
Metallic
Hardness:
5½ - 6
Specific Gravity:
7.30 (Calculated)
Crystal System:
Isometric
Member of:
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.
Type Locality:
A rhenium sulfide with a spinel-type structure.
One of a very few Re-dominant minerals; compare dzhezkazganite and, e.g., rheniite, rhenium, and 'UM1986-51-S:Re'.
One of a very few Re-dominant minerals; compare dzhezkazganite and, e.g., rheniite, rhenium, and 'UM1986-51-S:Re'.
Unique Identifiers
Mindat ID:
25693
Long-form identifier:
mindat:1:1:25693:3
IMA Classification of Tarkianite
Approved
IMA Formula:
(Cu,Fe)(Re,Mo)4S8
Approval year:
2003
First published:
2004
Classification of Tarkianite
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
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Trk | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Tarkianite
Metallic
Transparency:
Opaque
Colour:
Black
Streak:
Black
Hardness:
5½ - 6 on Mohs scale
Hardness:
VHN15=561 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
7.30 g/cm3 (Calculated)
Optical Data of Tarkianite
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 470nm | 38.02% |
| 546nm | 38.87% |
| 589nm | 39.18% |
| 650nm | 39.30% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 39.30%.
Colour in reflected light:
Light gray in air, brown-gray in oil
Chemistry of Tarkianite
Mindat Formula:
(Cu,Fe)(Re,Mo)4S8
Element Weights:
Crystallography of Tarkianite
Crystal System:
Isometric
Class (H-M):
43m - Hextetrahedral
Space Group:
F43m
Cell Parameters:
a = 9.563(1) Å
Unit Cell V:
874.55 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.531 Å | (100) |
| 2.885 Å | (90) |
| 2.389 Å | (90) |
| 1.841 Å | (90) |
| 1.690 Å | (80) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3b: Earth’s earliest hydrosphere | >4.45 |
| 12 : Hadean hydrothermal subsurface sulfide deposits (see also #33) | |
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 37 : Layered igneous intrusions and related PGE minerals |
Type Occurrence of Tarkianite
General Appearance of Type Material:
microscopic grains to 0.1 mm across, included in pentlandite and pyrrhotite
Place of Conservation of Type Material:
Finnish Museum of Natural History, University of Helsinki, Finland.
Geological Setting of Type Material:
Sulfide and PGM deposit
Associated Minerals at Type Locality:
Synonyms of Tarkianite
Other Language Names for Tarkianite
Relationship of Tarkianite to other Species
Member of:
Other Members of Linnaeite Subgroup:
| Cadmoindite | CdIn2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Cuprorhodsite | (Cu+0.5Fe3+0.5)Rh3+2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Daubréelite | Fe2+Cr3+2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Greigite | Fe2+Fe3+2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Grimmite | NiCo2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Indite | FeIn2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Joegoldsteinite | MnCr2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Kalininite | ZnCr2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Linnaeite | Co2+Co3+2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Polydymite | Ni2+Ni3+2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Siegenite | CoNi2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Violarite | Fe2+Ni3+2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Xingzhongite | Pb2+Ir3+2S4 | Iso. |
Structurally related to group(s):
| Linnaeite Subgroup | The Linnaeite Subgroup is a subgroup of the Thiospinel Group in the Spinel Supergroup. |
Related Minerals - Strunz-mindat Grouping
| 2.DB. | Stangersite | SnGeS3 |
| 2.DB.05 | Antimonselite | Sb2Se3 |
| 2.DB.05 | Metastibnite | Sb2S3 |
| 2.DB.05 | Pääkkönenite | Sb2AsS2 |
| 2.DB.05 | Bismuthinite | Bi2S3 |
| 2.DB.05 | Stibnite | Sb2S3 |
| 2.DB.05 | Guanajuatite | Bi2Se3 |
| 2.DB.10 | Suredaite | PbSnS3 |
| 2.DB.10 | Ottemannite | Sn2S3 |
| 2.DB.15 | Kashinite | Ir2S3 |
| 2.DB.15 | Bowieite | Rh2S3 |
| 2.DB.20 | Montbrayite | (Au,Ag,Sb,Bi,Pb)23(Te,Sb,Bi,Pb)38 |
| 2.DB.25 | Edgarite | FeNb3S6 |
| 2.DB.35 | Cameronite | Cu5-x(Cu,Ag)3+xTe10 (x = 0.43) |
| 2.DB.40 | 'Schreibersite (of Shephard)' | Cr2S3 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Tarkianite
mindat.org URL:
https://www.mindat.org/min-25693.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
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References for Tarkianite
Reference List:
Tarkian, Mahmud, Housley, Robert M., Volborth, Alexis, Greis, Ortwin, Moh, Günter H. (1991) Unnamed Re-Mo-Cu sulfide from the Stillwater complex, and crystal chemistry of its synthetic equivalent spinel type (Cu,Fe)(Re,Mo)4S8. European Journal of Mineralogy, 3 (6). 977-982 doi:10.1127/ejm/3/6/0977
Mandarino, Joseph A. (2004) New minerals. The Canadian Mineralogist, 42 (6) 1901-1927 doi:10.2113/gscanmin.42.6.1901
Kojonen, K. K., Roberts, A. C., Isomaki, O.-P., Knauf, V. V., Johanson, B., Pakkanen, L. (2004) Tarkianite, (Cu,Fe)(Re,Mo)4S8, a new mineral species from the Hitura mine, Nivala, Finland. The Canadian Mineralogist, 42 (2) 539-544 doi:10.2113/gscanmin.42.2.539
Localities for Tarkianite
Showing 11 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Austria | |
| Melcher et al. (2019) +1 other reference |
Canada | |
| Warren (2013) |
| Kojonen et al. (2004) |
Finland (TL) | |
| Kojonen et al. (2004) |
| Kojonen et al. (2004) |
Laos | |
| Khoanta et al. (2016) |
Russia | |
| Kolotilina et al. (2019) +1 other reference |
| Kojonen et al. (2004) |
| Kojonen et al. (2004) |
| Barkov et al. (2004) | |
USA | |
| Kojonen et al. (2004) |
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