Genkinite (original) (raw)
A valid IMA mineral species
About GenkiniteHide
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Originally given as (Pt,Pd,Rh)4Sb3.
Colour:
Pale brown or yellowish tan
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 IdentifiersHide
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Long-form identifier:
mindat:1:1:1672:4
0f857bc2-b9e5-4443-8994-db21c5ba9d48
IMA Classification of GenkiniteHide
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Type description reference:
Classification of GenkiniteHide
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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
2.6.4.1
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
Mineral SymbolsHide
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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 GenkiniteHide
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Colour:
Pale brown or yellowish tan
Hardness:
VHN25=603 - 677 kg/mm2 - Vickers
Density:
9.256 g/cm3 (Calculated)
Optical Data of GenkiniteHide
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Anisotropism:
Moderate to strong - from gray to extinction
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
Chemistry of GenkiniteHide
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Mindat Formula:
Pt4Sb3
Originally given as (Pt,Pd,Rh)4Sb3.
Common Impurities:
Rh,Ni,Cu,Bi,As
Crystallography of GenkiniteHide
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Crystal System:
Tetragonal
Class (H-M):
422 - Trapezohedral
Cell Parameters:
a = 7.736(1) Å, c = 24.161(2) Å
Unit Cell V:
1,445.93 ų (Calculated from Unit Cell)
Morphology:
Irregular grains to 160 microns
Comment:
Space Group: n.d.
X-Ray Powder DiffractionHide
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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 EnvironmentHide
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Geological Setting:
In platinum bearing ophiolites or ultramafics and derived placers.
Type Occurrence of GenkiniteHide
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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.
Geological Setting of Type Material:
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 GenkiniteHide
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Other Language Names for GenkiniteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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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 GenkiniteHide
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References for GenkiniteHide
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Reference List:
Localities for GenkiniteHide
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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.
Locality ListHide
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- 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.