Genkinite
A valid IMA mineral species
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About Genkinite
Formula:
Pt4Sb3
Originally given as (Pt,Pd,Rh)4Sb3.
Colour:
Pale brown or yellowish tan
Hardness:
5½ - 6
Specific Gravity:
9.256 (Calculated)
Crystal System:
Tetragonal
Name:
Named by Louis J. Cabri, John M. Stewart, J.H.T. Laflamme, and J.T. Szymanski in honor of Aleksandr Dmitrievich Genkin (28 July 1919 - 9 July 2010), Russian mineralogist at the Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry, Russian Academy of Sciences (IGEM RAS) in Moscow. He was a specialist in the ore mineralogy and geology of the platinum group minerals, in particular working on the Cu-Ni mineral deposits of the Noril'sk area of the Russian Federation. Later in life he was a pioneer of advanced techniques in the search for trace amounts of precious metals in sulphides and sulpharsenides. He helped to describe 20 minerals and was a founder of the journal Geologiya Rudnykh Mestorozhdenii (Geology of Ore Deposits).
Unique Identifiers
Mindat ID:
1672
Long-form identifier:
mindat:1:1:1672:4
GUID
(UUID V4):
(UUID V4):
0f857bc2-b9e5-4443-8994-db21c5ba9d48
IMA Classification of Genkinite
Approved
Approval year:
1976
First published:
1977
Classification of Genkinite
2.AC.35a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
C : Alloys of metalloids with PGE
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
C : Alloys of metalloids with PGE
2.6.4.1
2 : SULFIDES
6 : AmBnXp, with (m+n):p = 4:3
2 : SULFIDES
6 : AmBnXp, with (m+n):p = 4:3
3.12.54
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
12 : Sulphides etc. of the platinum metals
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
12 : Sulphides etc. of the platinum metals
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 |
---|---|---|
Gki | 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 Genkinite
Transparency:
Opaque
Colour:
Pale brown or yellowish tan
Hardness:
5½ - 6 on Mohs scale
Hardness:
VHN25=603 - 677 kg/mm2 - Vickers
Density:
9.256 g/cm3 (Calculated)
Optical Data of Genkinite
Anisotropism:
Moderate to strong - from gray to extinction
Bireflectance:
weak
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
400nm | 45.6% | 45.6% |
420nm | 46.5% | 46.7% |
440nm | 47.6% | 48.0% |
460nm | 48.7% | 49.2% |
480nm | 49.9% | 50.4% |
500nm | 51.1% | 51.5% |
520nm | 52.3% | 52.7% |
540nm | 53.5% | 53.8% |
560nm | 54.5% | 54.8% |
580nm | 55.5% | 55.8% |
600nm | 56.5% | 56.7% |
620nm | 57.4% | 57.6% |
640nm | 58.2% | 58.2% |
660nm | 58.9% | 58.9% |
680nm | 59.5% | 59.5% |
700nm | 60.0% | 60.1% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 60.1%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Pale brown or tan with a yellowish tinge
Pleochroism:
Weak
Comments:
In oil
Chemistry of Genkinite
Mindat Formula:
Pt4Sb3
Originally given as (Pt,Pd,Rh)4Sb3.
Originally given as (Pt,Pd,Rh)4Sb3.
Elements listed:
Common Impurities:
Rh,Ni,Cu,Bi,As
Crystallography of Genkinite
Crystal System:
Tetragonal
Class (H-M):
4 2 2 - Trapezohedral
Cell Parameters:
a = 7.736(1) Å, c = 24.161(2) Å
Ratio:
a:c = 1 : 3.123
Unit Cell V:
1,445.93 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Irregular grains to 160 microns
Comment:
Space Group: n.d.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.265 Å | (100) |
3.020 Å | (90) |
1.934 Å | (60) |
1.910 Å | (50) |
0.9043 Å | (50b) |
0.9025 Å | (50b) |
2.146 Å | (40) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 3a: Earth’s earliest Hadean crust | >4.50 |
7 : Ultramafic igneous rocks | |
Near-surface Processes | |
26 : Hadean detrital minerals | |
Stage 4b: Highly evolved igneous rocks | >3.0 |
36 : Carbonatites, kimberlites, and related igneous rocks | |
37 : Layered igneous intrusions and related PGE minerals |
Geological Setting:
In platinum bearing ophiolites or ultramafics and derived placers.
Type Occurrence of Genkinite
General Appearance of Type Material:
Irregular grains ranging in size from less than 5 microns to about 165 x 165 microns.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, N79000.
Canadian Museum of Nature, Ottawa; Royal Ontario Museum, Toronto, Canada, M34861.
National Museum of Natural History, Washington, D.C., USA, 136485.
Canadian Museum of Nature, Ottawa; Royal Ontario Museum, Toronto, Canada, M34861.
National Museum of Natural History, Washington, D.C., USA, 136485.
Geological Setting of Type Material:
Platinum deposit.
Associated Minerals at Type Locality:
Reference:
Cabri, L.J., Stewart, J.M., Laflamme, J.H.G., Szymanski, J.T. (1977) Platinum-group minerals from Onverwacht. III. Genkinite, (Pt,Pd)4Sb3, a new mineral. Canadian Mineralogist: 15: 389-392.
Synonyms of Genkinite
Other Language Names for Genkinite
Common Associates
Associated Minerals Based on Photo Data:
2 photos of Genkinite associated with Isoferroplatinum | Pt3Fe |
2 photos of Genkinite associated with Sperrylite | PtAs2 |
1 photo of Genkinite associated with Geversite | PtSb2 |
1 photo of Genkinite associated with Stumpflite | PtSb |
1 photo of Genkinite associated with Tulameenite | Pt2CuFe |
1 photo of Genkinite associated with Tetraferroplatinum | PtFe |
1 photo of Genkinite associated with Fayalite-Forsterite Series | |
1 photo of Genkinite associated with Chromite | Fe2+Cr3+2O4 |
1 photo of Genkinite associated with Ruthenarsenite | (Ru,Ni)As |
Related Minerals - Strunz-mindat Grouping
2.AC. | Törnroosite | Pd11As2Te2 |
2.AC. | Vadlazarenkovite | Pd8Bi1.5Te1.25As0.25 |
2.AC.05a | Atheneite | Pd2As0.75Hg0.25 |
2.AC.05b | Vincentite | Pd3As |
2.AC.10c | Arsenopalladinite | Pd8(As,Sb)3 |
2.AC.10b | Mertieite | Pd8Sb2.5As0.5 |
2.AC.10a | Stillwaterite | Pd8As3 |
2.AC.15a | Isomertieite | Pd11Sb2As2 |
2.AC.15b | Pseudomertieite | Pd11(Sb,As)4 |
2.AC.15a | Miessiite | Pd11Te2Se2 |
2.AC.20b | Palarstanide | Pd5(Sn,As)2 |
2.AC.20a | Stibiopalladinite | Pd5Sb2 |
2.AC.20c | Menshikovite | Pd3Ni2As3 |
2.AC.25e | Majakite | PdNiAs |
2.AC.25a | Palladoarsenide | Pd2As |
2.AC.25f | Palladobismutharsenide | Pd2(As,Bi) |
2.AC.25c | Palladodymite | (Pd,Rh)2As |
2.AC.25b | Rhodarsenide | (Rh,Pd)2As |
2.AC.25d | Naldrettite | Pd2Sb |
2.AC.30 | UM1999-02-As:NiRh | (Rh,Ni)7As4 |
2.AC.30 | Polkanovite | Rh12As7 |
2.AC.35b | Ungavaite | Pd4Sb3 |
2.AC.40 | Polarite | Pd(Bi,Pb) |
2.AC.45a | Froodite | α-PdBi2 |
2.AC.50 | Nipalarsite | Ni8Pd3As4 |
2.AC.50 | Viteite | Pd5InAs |
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 Genkinite
mindat.org URL:
https://www.mindat.org/min-1672.html
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Please feel free to link to this page.
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References for Genkinite
Localities for Genkinite
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 | |
| 5th International Platinum Symposium ... |
Canada | |
| Jackson-Brown et al. (2014) |
| Nixon et al. (1990) |
Nixon et al. (1990) | |
Nixon et al. (1990) | |
| Wilson et al. (2013) |
Ethiopia | |
| Econ Geol (1986) |
| Cabri et al. (1981) |
Russia | |
| Sidorov et al. (2004) |
Tony Nikischer specimen and analysis +1 other reference | |
| Zhmodik et al. (2016) |
South Africa | |
| Cairncross et al. (1995) +2 other references |
| II et al. (3) +3 other references |
| Hutchinson et al. (2005) |
Hutchinson et al. (2005) | |
Tanzania | |
| Wilhelmij et al. (2016) |
UK | |
| Anthony et al. (1990) |
Anthony et al. (1990) | |
Zaccarini F et al. (PGE) +2 other references | |
USA | |
| Anthony et al. (1990) |
| Belkin et al. (2021) |
Quick NavTopAbout GenkiniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Mount Filipp, Sobolevsky District, Kamchatka Krai, Russia