Talnakhite (original) (raw)
Long-form identifier:
mindat:1:1:3877:1
0a4400e9-5bac-4e8f-80c8-d352da7bcba3
2.CB.10b
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2.9.8.1
2 : SULFIDES
9 : AmBnXp, with (m+n):p = 1:1
3.1.35
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
1 : Sulphides etc. of Cu
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Tlk | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Tlk | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Colour:
Brass-yellow, tarnishes to pink, purple, or brown tints, then iridescent
Hardness:
VHN50=261 - 277 kg/mm2 - Vickers
Fracture:
Irregular/Uneven
Density:
4.29 g/cm3 (Measured) 4.32 g/cm3 (Calculated)
Reflectivity:
| Wavelength | R |
|---|---|
| 460nm | 22.4% |
| 480nm | 24.7% |
| 500nm | 30.0% |
| 520nm | 32.7% |
| 540nm | 35.4% |
| 560nm | 37.5% |
| 580nm | 38.8% |
| 600nm | 39.8% |
| 620nm | 39.6% |
| 640nm | 40.8% |
| 660nm | 41.1% |
| 680nm | 41.8% |
| 700nm | 41.6% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 41.8%.
Class (H-M):
43_m_ - Hextetrahedral
Cell Parameters:
a = 10.593 Å
Unit Cell V:
1,188.66 ų (Calculated from Unit Cell)
Comment:
Not yet found as distinct crystals
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000272 | Talnakhite | Hall S R, Gabe E J (1972) The crystal structure of talnakhite, Cu18Fe16S32 model B American Mineralogist 57 368-380 |  |
1972 | 0 | 293 |
CIF Raw Data - click here to close
Co-Type Localities:
ⓘ Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Putoran Plateau, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
ⓘ Severniy Mine, Talnakh Cu-Ni Deposit, Norilsk-Talnakh Mining Region, Putoran Plateau, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia
Place of Conservation of Type Material:
- Mining Institute, St. Petersburg, Russia, 103a/1–5.
- A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 69836–69839.
- Canadian Museum of Nature, Ottawa, Canada.
- Royal Ontario Museum, Toronto, Canada, M29419.
- National Museum of Natural History, Washington, D.C., USA, 121944.
Associated Minerals at Type Locality:
Thermal Behaviour:
At 80-100 degrees the mineral decomposes to tetragonal cubanite + bornite.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.