Talnakhite
A valid IMA mineral species
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About Talnakhite
Formula:
Cu9(Fe,Ni)8S16
Colour:
Brass-yellow, tarnishes to pink, purple, or brown tints, then iridescent
Lustre:
Metallic, Sub-Metallic
Hardness:
4½
Specific Gravity:
4.29
Crystal System:
Isometric
Member of:
Name:
Named after its discovery locality, the Talnakh Cu-Ni deposits, near Noril'sk, Russia.
Yellow similar to chalcopyrite. Tarnishes brown, purple, or pink.
Unique Identifiers
Mindat ID:
3877
Long-form identifier:
mindat:1:1:3877:1
GUID
(UUID V4):
(UUID V4):
0a4400e9-5bac-4e8f-80c8-d352da7bcba3
IMA Classification of Talnakhite
Classification of Talnakhite
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 : 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
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
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
Mineral Symbols
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.
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 |
Physical Properties of Talnakhite
Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Brass-yellow, tarnishes to pink, purple, or brown tints, then iridescent
Hardness:
4½ on Mohs scale
Hardness:
VHN50=261 - 277 kg/mm2 - Vickers
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.29 g/cm3 (Measured) 4.32 g/cm3 (Calculated)
Optical Data of Talnakhite
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%.
Chemistry of Talnakhite
Mindat Formula:
Cu9(Fe,Ni)8S16
Elements listed:
Crystallography of Talnakhite
Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
I4 3m
Cell Parameters:
a = 10.593 Å
Unit Cell V:
1,188.66 ų (Calculated from Unit Cell)
Z:
2
Comment:
Not yet found as distinct crystals
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
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
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
15.89 Å | (100) |
7.94 Å | (25) |
7.62 Å | (9) |
7.46 Å | (30) |
7.20 Å | (7) |
5.92 Å | (18) |
5.06 Å | (4) |
4.68 Å | (3) |
4.36 Å | (13) |
4.32 Å | (20) |
4.19 Å | (4) |
4.03 Å | (9) |
3.82 Å | (35) |
3.76 Å | (11) |
3.59 Å | (20) |
3.35 Å | (25) |
3.30 Å | (14) |
3.18 Å | (12) |
3.14 Å | (30) |
3.04 Å | (2) |
2.957 Å | (8) |
2.929 Å | (5) |
2.844 Å | (15) |
2.822 Å | (19) |
2.791 Å | (3) |
2.739 Å | (14) |
2.709 Å | (3) |
2.643 Å | (11) |
2.627 Å | (15) |
2.571 Å | (8) |
2.542 Å | (4) |
2.486 Å | (2) |
2.462 Å | (1) |
2.398 Å | (11) |
2.348 Å | (4) |
2.267 Å | (4) |
2.174 Å | (3) |
2.153 Å | (3) |
2.124 Å | (2) |
2.090 Å | (5) |
2.068 Å | (10) |
2.044 Å | (1) |
1.994 Å | (3) |
1.982 Å | (2) |
1.970 Å | (2) |
Comments:
ICDD 29-981
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 3b: Earth’s earliest hydrosphere | >4.45 |
15 : Black/white smoker minerals and other seafloor hydrothermal minerals | |
High-𝑇 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 Talnakhite
Co-Type Localities:
Place of Conservation of Type Material:
1) Mining Institute, St. Petersburg, Russia, 103a/1–5.
2) A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 69836–69839.
3) Canadian Museum of Nature, Ottawa, Canada.
4) Royal Ontario Museum, Toronto, Canada, M29419.
5) National Museum of Natural History, Washington, D.C., USA, 121944.
2) A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 69836–69839.
3) Canadian Museum of Nature, Ottawa, Canada.
4) Royal Ontario Museum, Toronto, Canada, M29419.
5) National Museum of Natural History, Washington, D.C., USA, 121944.
Associated Minerals at Type Locality:
Synonyms of Talnakhite
Other Language Names for Talnakhite
Relationship of Talnakhite to other Species
Member of:
Other Members of this group:
Haycockite | Cu4Fe5S8 | Orth. 2 2 2 |
Mooihoekite | Cu9Fe9S16 | Tet. 4 2m : P4 2m |
Putoranite | Cu1.1Fe1.2S2 | Iso. m3m (4/m 3 2/m) : Pn3m |
Common Associates
Associated Minerals Based on Photo Data:
17 photos of Talnakhite associated with Galena | PbS |
14 photos of Talnakhite associated with Sperrylite | PtAs2 |
8 photos of Talnakhite associated with Chalcopyrite | CuFeS2 |
8 photos of Talnakhite associated with Shadlunite | (Pb,Cd)(Fe,Cu)8S8 |
7 photos of Talnakhite associated with Silver | Ag |
7 photos of Talnakhite associated with Magnetite | Fe2+Fe3+2O4 |
6 photos of Talnakhite associated with Mooihoekite | Cu9Fe9S16 |
6 photos of Talnakhite associated with Pentlandite | (NixFey)Σ9S8 |
6 photos of Talnakhite associated with Cubanite | CuFe2S3 |
5 photos of Talnakhite associated with Moncheite | Pt(Te,Bi)2 |
Related Minerals - Strunz-mindat Grouping
2.CB. | Agmantinite | Ag2MnSnS4 |
2.CB. | Richardsite | Zn2CuGaS4 |
2.CB. | Gachingite | Au(Te1-xSex) |
2.CB. | Tolstykhite | Au3S4Te6 |
2.CB. | Hanswilkeite | KFeS2 |
2.CB. | Auroselenide | AuSe |
2.CB. | Ruizhongite | (Ag2◻)Pb3Ge2S8 |
2.CB. | Okruginite | Cu2SnSe3 |
2.CB.05a | Coloradoite | HgTe |
2.CB.05a | Hawleyite | CdS |
2.CB.05a | Metacinnabar | HgS |
2.CB.05c | Polhemusite | (Zn,Hg)S |
2.CB.05b | Sakuraiite | (Cu,Zn,Fe)3(In,Sn)S4 |
2.CB.05a | Sphalerite | ZnS |
2.CB.05a | Stilleite | ZnSe |
2.CB.05a | Tiemannite | HgSe |
2.CB.05 | UM1998-15-S:CuFeZn | Cu2Fe3Zn5S10 |
2.CB.05a | Rudashevskyite | (Fe,Zn)S |
2.CB.05a | Ishiharaite | (Cu,Ga,Fe,In,Zn)S |
2.CB.07a | Shenzhuangite | NiFeS2 |
2.CB.07a | Unnamed (Cu-Mn-Sn Sulpide) | Cu2MnSnS4 |
2.CB.10a | Chalcopyrite | CuFeS2 |
2.CB.10a | Eskebornite | CuFeSe2 |
2.CB.10a | Gallite | CuGaS2 |
2.CB.10b | Haycockite | Cu4Fe5S8 |
2.CB.10a | Lenaite | AgFeS2 |
2.CB.10b | Mooihoekite | Cu9Fe9S16 |
2.CB.10b | Putoranite | Cu1.1Fe1.2S2 |
2.CB.10a | Roquesite | CuInS2 |
2.CB.10a | Laforêtite | AgInS2 |
2.CB.10a | Unnamed (Cu-Zn-In Sulphide) | CuZn2InS4 |
2.CB.10a | UM1984-30-S:CuFeSn | Cu2Fe2Sn3S7 |
2.CB.10c | Omariniite | Cu8Fe2ZnGe2S12 |
2.CB.15a | Černýite | Cu2(Cd,Zn,Fe)SnS4 |
2.CB.15a | Ferrokësterite | Cu2FeSnS4 |
2.CB.15a | Hocartite | Ag2(Fe2+,Zn)SnS4 |
2.CB.15a | Idaite | Cu5FeS6 |
2.CB.15a | Kësterite | Cu2ZnSnS4 |
2.CB.15a | Kuramite | Cu3SnS4 |
2.CB.15b | Mohite | Cu2SnS3 |
2.CB.15a | Pirquitasite | Ag2ZnSnS4 |
2.CB.15a | Stannite | Cu2FeSnS4 |
2.CB.15c | Stannoidite | Cu+6Cu2+2(Fe2+,Zn)3Sn2S12 |
2.CB.15a | Velikite | Cu2HgSnS4 |
2.CB.15c | UM2006-11-S:CuFeGeZn | Cu8(Fe,Zn)3Ge2S12 (?) |
2.CB.17a v | Arsenic-bearing Renierite | Cu11GeAsFe4S16 |
2.CB.20 | Chatkalite | Cu6FeSn2S8 |
2.CB.20 | Mawsonite | Cu6Fe2SnS8 |
2.CB.30 | Argyropyrite | near Ag2Fe7S11 |
2.CB.30 | Colusite | Cu13VAs3S16 |
2.CB.30 | Germanite | Cu13Fe2Ge2S16 |
2.CB.30 | Germanocolusite | Cu26V2(Ge,As)6S32 |
2.CB.30 | Nekrasovite | Cu26V2(Sn,As,Sb)6S32 |
2.CB.30 | Stibiocolusite | Cu13V(Sb,Sn,As)3S16 |
2.CB.30 | Ovamboite | Cu20(Fe,Cu,Zn)6W2Ge6S32 |
2.CB.30 | Maikainite | Cu20(Fe,Cu)6Mo2Ge6S32 |
2.CB.30 | Frieseite | Ag2Fe5S8 (?) |
2.CB.35a | Hemusite | Cu6SnMoS8 |
2.CB.35a | Kiddcreekite | Cu6SnWS8 |
2.CB.35a | Polkovicite | (Fe,Pb)3(Ge,Fe)1-xS4 |
2.CB.35a | Renierite | (Cu1+,Zn)11Fe4(Ge4+,As5+)2S16 |
2.CB.35a | Vinciennite | Cu+7Cu2+3Fe2+2Fe3+2Sn(As,Sb)S16 |
2.CB.35a | Morozeviczite | (Pb,Fe)3Ge1-xS4 |
2.CB.35b | Catamarcaite | Cu6GeWS8 |
2.CB.40 | Lautite | CuAsS |
2.CB.42 | Lingbaoite | AgTe3 |
2.CB.45 | Cadmoselite | CdSe |
2.CB.45 | Greenockite | CdS |
2.CB.45 | Wurtzite | (Zn,Fe)S |
2.CB.45 | Rambergite | MnS |
2.CB.45 | Buseckite | (Fe,Zn,Mn)S |
2.CB.45 | Maletoyvayamite | Au3Se4Te6 |
2.CB.47 | Murchisite | Cr5S6 |
2.CB.50 | Zincselenide | ZnSe |
2.CB.50 | Wassonite | TiS |
2.CB.52 | Dzhezkazganite | ReMoCu2PbS6 ? |
2.CB.55a | Cubanite | CuFe2S3 |
2.CB.55b | Isocubanite | CuFe2S3 |
2.CB.60 | Picotpaulite | TlFe2S3 |
2.CB.60 | Raguinite | TlFeS2 |
2.CB.65 | Argentopyrite | AgFe2S3 |
2.CB.65 | Sternbergite | AgFe2S3 |
2.CB.70 | Sulvanite | Cu3VS4 |
2.CB.75 | Vulcanite | CuTe |
2.CB.80 | Empressite | AgTe |
2.CB.85 | Muthmannite | AuAgTe2 |
Fluorescence of Talnakhite
Not fluorescent in UV.
Other Information
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.
Internet Links for Talnakhite
mindat.org URL:
https://www.mindat.org/min-3877.html
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References for Talnakhite
Localities for Talnakhite
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).
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.
All localities listed without proper references should be considered as questionable.
Australia | |
| Hein (1994) |
Hein (1994) | |
Azerbaijan | |
| - (2005) |
Canada | |
| Ames et al. (2003) |
China | |
| Kefen Yue et al. (2005) |
| Jiuhua Xu et al. (2001) |
| Keevil et al. (2022) |
| Anthony |
Cyprus | |
| Antivachis (2015) |
East Timor | |
| Angela Lay et al. (2014) +1 other reference |
Finland | |
| Geological Survey of Finland (2017) |
| 33 IGC excursion No 15 |
| Geological Survey of Finland 2008. ... +2 other references |
| 33 IGC excursion No 15 |
Greece | |
| Möckel (2001) |
Japan | |
| Weiss (2012) |
Kitakaze (1998) +1 other reference | |
| Ishiyama (1982) |
| Takechi et al. (2003) |
Romania | |
| minerals-of-the-carpathians.eu (2008) |
| Hîrtopanu (1997) +1 other reference |
Russia | |
| Konnikov et al. (2000) +1 other reference |
Kislov +1 other reference | |
| Chudnenko +2 other references |
| Alexander V. Dedeev et al (2002) |
| Spiridonov et al. (2015) |
| Bud'ko et al. (1968) +1 other reference |
Anthony et al. (1990) +1 other reference | |
Marfin +9 other references | |
2014 Ultramafic-mafic intrusions +1 other reference | |
Czamanske. et al (1992) | |
| Pekov (1998) |
| Shvedov et al. (2015) |
| Orsoev et al. (1985) |
| Grokhovskaya et al. (2000) |
| Grokhovskaya et al. (2005) |
Grishaenko et al. (2007) | |
South Africa | |
| Henning et al. (1997) |
| Cairncross et al. (1995) |
| Andreoli et al. (2008) |
Spain | |
| Gutiérrez et al. (2000) |
| Simon et al. (1997) +1 other reference |
USA | |
| Moreton et al. (2009) |
55TH INSTITUTE ON LAKE SUPERIOR GEOLOGY (2009) | |
| Good et al. (2010) |
Desautels et al. (2007) | |
McSwiggen (1999) +1 other reference | |
| Anthony et al. (1990) |
| Borrok et al. (1999) +1 other reference |
Borrok et al. (1999) | |
The Moon | |
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Talnakh Cu-Ni Deposit, Noril'sk, Putoran Plateau, Taimyr Peninsula, Taymyrskiy Autonomous Okrug, Krasnoyarsk Krai, Russia