Geversite
A valid IMA mineral species
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About Geversite
Formula:
PtSb2
Colour:
Light grey
Lustre:
Metallic
Hardness:
4½ - 5
Specific Gravity:
10.97 (Calculated)
Crystal System:
Isometric
Member of:
Name:
Named by E.F. Stumpfl in 1961 in honor of Traugott Wilhelm Gevers (23 April 1900, New Hanover, Natal (now South Africa) - 19 August 1991), geologist who worked in Namibia for the Geological Survey of South Africa and later a professor at the University of Witwatersrand. Pronounced GĒ-VERZAIT.
Unique Identifiers
Mindat ID:
1687
Long-form identifier:
mindat:1:1:1687:8
GUID
(UUID V4):
(UUID V4):
befd0450-d833-4bda-a906-1f6c4feaf418
Classification of Geversite
Approved
First published:
1961
Type description reference:
2.EB.05a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
2.12.1.14
2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
3.12.52
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 |
---|---|---|
Gev | 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 Geversite
Metallic
Transparency:
Opaque
Colour:
Light grey
Hardness:
4½ - 5 on Mohs scale
Hardness:
VHN50=726 - 766 kg/mm2 - Vickers
Density:
10.97 g/cm3 (Calculated)
Optical Data of Geversite
Reflectivity:
Wavelength | R |
---|---|
400nm | 58.9% |
420nm | 59.1% |
440nm | 59.3% |
460nm | 59.4% |
480nm | 59.4% |
500nm | 59.4% |
520nm | 59.2% |
540nm | 58.9% |
560nm | 58.4% |
580nm | 57.8% |
600nm | 57.4% |
620nm | 57.3% |
640nm | 57.2% |
660nm | 57.2% |
680nm | 57.4% |
700nm | 57.8% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 59.4%.
Colour in reflected light:
Light gray
Pleochroism:
Non-pleochroic
Chemical Properties of Geversite
Formula:
PtSb2
Elements listed:
Crystallography of Geversite
Crystal System:
Isometric
Class (H-M):
m3 (2/m 3) - Diploidal
Space Group:
Pa3
Setting:
Pa3
Cell Parameters:
a = 6.428 Å
Unit Cell V:
265.60 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Tiny grains
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) |
---|---|---|---|---|---|---|---|
0017787 | Geversite | Furuseth S, Selte K, Kjekshus A (1965) Redetermined crystal structures of PdAs2, PdSb2, PtP2, PtAs2, PtSb2, alpha-PtBi2, and AuSb2 Acta Chemica Scandinavica 19 735-741 | 1965 | synthetic | 0 | 293 | |
0017685 | Geversite | Furuseth S, Selte K, Kjekshus A (1967) On the solid solubility and structural properties of PdAs2-xSbx, PtP2-xAsx, PtP2-xSbx, PtP2-xBix, PtAs2-xSbx, PtAs2-xBix, PtSb2-xBix, Pdl-mPtmAs2, Pdl-mPtmSb2, Pdl-mAumSb2, and Ptl-mAumSb2 Acta Chemica Scandinavica 21 527-536 | 1967 | synthetic | 0 | 293 | |
0015807 | Geversite | Brese N E, von Schnering H G (1994) Bonding trends in pyrites and a reinvestigation of the structures of PdAs2, PdSb2, PtSb2 and PtBi2 Zeitschrift fur Anorganische und Allgemeine Chemie 620 393-404 | 1994 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
1.240 Å | (100) |
1.940 Å | (83) |
1.140 Å | (83) |
1.194 Å | (58) |
1.720 Å | (50) |
1.310 Å | (50) |
1.174 Å | (50) |
Comments:
Synthetic. (ICDD 14-141).
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
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 |
Geological Setting:
Ultramafic PGE deposits
Type Occurrence of Geversite
Place of Conservation of Type Material:
National School of Mines, Paris, France.
Geological Setting of Type Material:
Ultramafic platinum deposits
Reference:
Stumpfl, E.F. (1961) Some new platinoid-rich minerals, identified with the electron microanalyser. Mineralogical Magazine: 32: 833-847.
Other Language Names for Geversite
Relationship of Geversite to other Species
Member of:
Other Members of this group:
Aurostibite | AuSb2 | Iso. m3 (2/m 3) : Pa3 |
Cattierite | CoS2 | Iso. m3 (2/m 3) : Pa3 |
Dzharkenite | FeSe2 | Iso. m3 (2/m 3) : Pa3 |
Erlichmanite | OsS2 | Iso. m3 (2/m 3) : Pa3 |
Fukuchilite | Cu3FeS8 | Iso. m3 (2/m 3) : Pa3 |
Gaotaiite | Ir3Te8 | Iso. m3 (2/m 3) : Pa3 |
Hauerite | MnS2 | Iso. m3 (2/m 3) : Pa3 |
Insizwaite | Pt(Bi,Sb)2 | Iso. m3 (2/m 3) : Pa3 |
Krut'aite | CuSe2 | Iso. m3 (2/m 3) : Pa3 |
Laurite | RuS2 | Iso. m3 (2/m 3) : Pa3 |
Penroseite | (Ni,Co,Cu)Se2 | Iso. m3 (2/m 3) : Pa3 |
Pyrite | FeS2 | Iso. m3 (2/m 3) : Pa3 |
Sperrylite | PtAs2 | Iso. m3 (2/m 3) : Pa3 |
Trogtalite | CoSe2 | Iso. m3 (2/m 3) : Pa3 |
Vaesite | NiS2 | Iso. m3 (2/m 3) : Pa3 |
Villamanínite | (Cu,Ni,Co,Fe)S2 | Tric. |
Common Associates
Associated Minerals Based on Photo Data:
11 photos of Geversite associated with Paolovite | Pd2Sn |
9 photos of Geversite associated with Froodite | α-PdBi2 |
8 photos of Geversite associated with Breithauptite | NiSb |
7 photos of Geversite associated with Silver | Ag |
6 photos of Geversite associated with Galena | PbS |
5 photos of Geversite associated with Michenerite | PdBiTe |
4 photos of Geversite associated with Gold | Au |
3 photos of Geversite associated with Niggliite | PtSn |
2 photos of Geversite associated with Chalcopyrite | CuFeS2 |
2 photos of Geversite associated with Sudburyite | PdSb |
Related Minerals - Strunz-mindat Grouping
2.EB. | Iridarsenite | (Ir,Ru)As2 |
2.EB. | Selenolaurite | RuSe2 |
2.EB. | Andrieslombaardite | RhSbS |
2.EB. | Kanatzidisite | (SbBiS3)2Te2 |
2.EB.05a | Aurostibite | AuSb2 |
2.EB.05b | Bambollaite | Cu(Se,Te)2 |
2.EB.05a | Cattierite | CoS2 |
2.EB.05a | Erlichmanite | OsS2 |
2.EB.05a | Fukuchilite | Cu3FeS8 |
2.EB.05a | Hauerite | MnS2 |
2.EB.05a | Insizwaite | Pt(Bi,Sb)2 |
2.EB.05a | Krut'aite | CuSe2 |
2.EB.05a | Laurite | RuS2 |
2.EB.05a | Penroseite | (Ni,Co,Cu)Se2 |
2.EB.05a | Pyrite | FeS2 |
2.EB.05a | Sperrylite | PtAs2 |
2.EB.05a | Trogtalite | CoSe2 |
2.EB.05a | Vaesite | NiS2 |
2.EB.05a | Villamanínite | (Cu,Ni,Co,Fe)S2 |
2.EB.05a | Dzharkenite | FeSe2 |
2.EB.05a | Gaotaiite | Ir3Te8 |
2.EB.05a v | Cayeuxite | |
2.EB.10b | Alloclasite | Co1-xFexAsS |
2.EB.10d | Costibite | CoSbS |
2.EB.10a | Ferroselite | FeSe2 |
2.EB.10a | Frohbergite | FeTe2 |
2.EB.10c | Glaucodot | (Co0.50Fe0.50)AsS |
2.EB.10a | Kullerudite | NiSe2 |
2.EB.10a | Marcasite | FeS2 |
2.EB.10a | Mattagamite | CoTe2 |
2.EB.10e | Paracostibite | CoSbS |
2.EB.10e | Pararammelsbergite | NiAs2 |
2.EB.10f | Oenite | CoSbAs |
2.EB.10a | Petříčekite | CuSe2 |
2.EB.15a | Anduoite | (Ru,Os)As2 |
2.EB.15a | Clinosafflorite | CoAs2 |
2.EB.15a | Löllingite | FeAs2 |
2.EB.15a | Nisbite | NiSb2 |
2.EB.15a | Omeiite | (Os,Ru)As2 |
2.EB.15c | Paxite | CuAs2 |
2.EB.15a | Rammelsbergite | NiAs2 |
2.EB.15a | Safflorite | (Co,Ni,Fe)As2 |
2.EB.15b | Seinäjokite | (Fe,Ni)(Sb,As)2 |
2.EB.20 | Arsenopyrite | FeAsS |
2.EB.20 | Gudmundite | FeSbS |
2.EB.20 | Osarsite | (Os,Ru)AsS |
2.EB.20 | Ruarsite | (Ru,Os)AsS |
2.EB.25 va | Antimony-bearing Gersdorffite | Ni(As,Sb)S |
2.EB.25 | Cobaltite | CoAsS |
2.EB.25 | Gersdorffite | NiAsS |
2.EB.25 | Hollingworthite | (Rh,Pt,Pd)AsS |
2.EB.25 | Irarsite | (Ir,Ru,Rh,Pt)AsS |
2.EB.25 | Jolliffeite | NiAsSe |
2.EB.25 | Krutovite | NiAs2 |
2.EB.25 | Maslovite | PtBiTe |
2.EB.25 | Michenerite | PdBiTe |
2.EB.25 | Padmaite | PdBiSe |
2.EB.25 | Platarsite | PtAsS |
2.EB.25 | Testibiopalladite | PdTe(Sb,Te) |
2.EB.25 | Tolovkite | IrSbS |
2.EB.25 | Ullmannite | NiSbS |
2.EB.25 | Willyamite | CoSbS |
2.EB.25 | Changchengite | IrBiS |
2.EB.25 | Mayingite | IrBiTe |
2.EB.25 | Kalungaite | PdAsSe |
2.EB.25 | Milotaite | PdSbSe |
2.EB.25 | Paragersdorffite | Ni(As,S)2 |
2.EB.25 | Orthogersdorffite | NiAsS |
2.EB.30 | Urvantsevite | Pd(Bi,Pb)2 |
2.EB.35 | Rheniite | ReS2 |
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.
Industrial Uses:
Platinum ore
Internet Links for Geversite
mindat.org URL:
https://www.mindat.org/min-1687.html
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References for Geversite
Reference List:
Localities for Geversite
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.
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Driekop mine, Sekhukhuneland, Burgersfort, Fetakgomo Tubatse Local Municipality, Sekhukhune District Municipality, Limpopo, South Africa