Hongshiite
A valid IMA mineral species
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Formula:
PtCu
Colour:
Grey, lead-gray, steel-gray, may be tarnished brown
Lustre:
Metallic
Hardness:
4
Specific Gravity:
15.71
Crystal System:
Trigonal
Name:
Named for the type locality, Hongshi village.
This page provides mineralogical data about Hongshiite.
Unique Identifiers
Mindat ID:
1929
Long-form identifier:
mindat:1:1:1929:9
GUID
(UUID V4):
(UUID V4):
49801f34-0918-4930-9382-33f12bacad4b
IMA Classification of Hongshiite
Approved
Approval year:
1974
Classification of Hongshiite
1.AG.45
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
G : PGE-metal alloys
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
G : PGE-metal alloys
Dana 7th ed.:
1.2.3.1
1.2.3.1
1 : NATIVE ELEMENTS AND ALLOYS
2 : Platinum Group Metals and Alloys
1 : NATIVE ELEMENTS AND ALLOYS
2 : Platinum Group Metals and Alloys
1.83
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Hng | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Hongshiite
Metallic
Transparency:
Opaque
Colour:
Grey, lead-gray, steel-gray, may be tarnished brown
Streak:
Black
Hardness:
4 on Mohs scale
Hardness:
VHN50=204 - 227 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {1011}
On {1011}
Density:
15.71 g/cm3 (Measured) 15.63 g/cm3 (Calculated)
Optical Data of Hongshiite
Anisotropism:
Weak to moderate, dull gray to dull reddish brown; coppery brown to bright blue.
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
400nm | 56.3% | 56.7% |
420nm | 57.5% | 58.7% |
440nm | 58.6% | 60.2% |
460nm | 59.4% | 61.4% |
480nm | 60.2% | 62.4% |
500nm | 60.7% | 63.3% |
520nm | 61.4% | 64.2% |
540nm | 62.1% | 65.0% |
560nm | 63.0% | 65.6% |
580nm | 63.9% | 66.3% |
600nm | 64.7% | 67.0% |
620nm | 66.2% | 68.2% |
640nm | 67.0% | 68.8% |
660nm | 68.3% | 70.0% |
680nm | 69.1% | 70.4% |
700nm | 69.7% | 70.8% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 70.8%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Bright white with a slight brownish tint
Internal Reflections:
None
Pleochroism:
Not Visible
Chemistry of Hongshiite
Mindat Formula:
PtCu
Elements listed:
Crystallography of Hongshiite
Crystal System:
Trigonal
Cell Parameters:
a = 10.713 Å, c = 13.192 Å
Ratio:
a:c = 1 : 1.231
Unit Cell V:
1,311.18 Ă
Âł (Calculated from Unit Cell)
Z:
48
Twinning:
Yes. Twin plane might be {1121}
Comment:
Point Group: 32, 3m or 3 2/m.; Space Group: R32, R3m, or R3m
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.199 Ă | (100) |
1.895 Ă | (80) |
1.148 Ă | (80) |
1.350 Ă | (50) |
1.325 Ă | (50) |
0.856 Ă | (50) |
4.35 Ă | (30) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
26 : Hadean detrital minerals | |
Stage 4b: Highly evolved igneous rocks | >3.0 |
37 : Layered igneous intrusions and related PGE minerals |
Type Occurrence of Hongshiite
General Appearance of Type Material:
Granular-massive aggregates or irregular plates
Place of Conservation of Type Material:
Institute of Geology, Chinese Academy of Geological Sciences, Beijing, China
Associated Minerals at Type Locality:
Reference:
Yu, T.-H., Lin, S.-J., Chao, P., Fang, C.-S., Huang, C.-S. (1974): A preliminary study of some new minerals of the platinum group and another associated new one in platinum-bearing intrusion in a region in China. Acta Geologica Sinica, 2, 202-218.
Other Language Names for Hongshiite
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Hongshiite associated with Palladodymite | (Pd,Rh)2As |
1 photo of Hongshiite associated with Ruthenium | (Ru,Ir) |
1 photo of Hongshiite associated with Rhodarsenide | (Rh,Pd)2As |
1 photo of Hongshiite associated with Osmium | (Os,Ir,Ru) |
1 photo of Hongshiite associated with Isoferroplatinum | Pt3Fe |
Related Minerals - Strunz-mindat Grouping
1.AG. | Michitoshiite-(Cu) | Rh(Cu1-xGex) |
1.AG. | Palladothallite | Pd3Tl |
1.AG. | Sluzhenikinite | Pd15(Sb7-xSnx) |
1.AG. | Driekopite | PtBi |
1.AG. | Sidorovite | Fe3Pt |
1.AG.05 | Hexaferrum | (Fe,Os,Ru,Ir) |
1.AG.05 | Garutiite | (Ni,Fe,Ir) |
1.AG.10 | Atokite | (Pd,Pt)3Sn |
1.AG.10 | Rustenburgite | (Pt,Pd)3Sn |
1.AG.10 | Zvyagintsevite | Pd3Pb |
1.AG.15 | Taimyrite | (Pd,Cu,Pt)3Sn |
1.AG.15 | Tatyanaite | (Pt,Pd,Cu)9Cu3Sn4 |
1.AG.20 | Paolovite | Pd2Sn |
1.AG.25 | Plumbopalladinite | Pd3Pb2 |
1.AG.25 | Stannopalladinite | (Pd,Cu)3Sn |
1.AG.30 | Cabriite | Pd2CuSn |
1.AG.35 | Chengdeite | Ir3Fe |
1.AG.35 | Isoferroplatinum | Pt3Fe |
1.AG.40 | Ferronickelplatinum | Pt2FeNi |
1.AG.40 | Tetraferroplatinum | PtFe |
1.AG.40 | Tulameenite | Pt2CuFe |
1.AG.45 | Skaergaardite | PdCu |
1.AG.50 | Yixunite | Pt3In |
1.AG.55 | Damiaoite | PtIn2 |
1.AG.60 | Niggliite | PtSn |
1.AG.65 | Bortnikovite | Pd4Cu3Zn |
1.AG.70 | Nielsenite | PdCu3 |
1.AG.75 | Norilskite | (Pd,Ag)2xPb (x = 0.08 - 0.11) |
Other Information
Notes:
Insoluble in HCl and HNO3.
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 Hongshiite
mindat.org URL:
https://www.mindat.org/min-1929.html
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Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Hongshiite
Reference List:
Localities for Hongshiite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Brazil | |
| Cabral A (2014) |
Canadian Mineralogist: 40: 711-723. | |
Kwitko et al. (2002) | |
Kwitko et al. (2002) | |
| Cabral et al. (2021) |
Canada | |
| Jackson-Brown et al. (2014) |
| Edwards (1990) |
China (TL) | |
| Yu Zuxiang et al. (1974) +1 other reference |
Czech Republic | |
| Malec J +1 other reference |
DR Congo | |
| Cabral et al. (2015) +1 other reference |
Cabral et al. (2014) | |
Ecuador | |
| Weiser et al. (1993) |
Finland | |
Törnroos Ragnar | |
| 33rd International Geological Congress (2008) |
| Kari Kojonen (2012) |
Kojonen et al. (2014) | |
| Mutanen (1997) |
France | |
| Ducluzaux B. (2022) |
| Lorand et al. (2018) +1 other reference |
Japan | |
| NISHIOâHAMANE et al. (2022) |
| NISHIOâHAMANE et al. (2022) |
NISHIOâHAMANE et al. (2022) | |
| NISHIOâHAMANE et al. (2022) |
| NISHIOâHAMANE et al. (2022) |
| NISHIOâHAMANE et al. (2022) |
Philippines | |
| OberthĂŒr et al. (2017) |
Russia | |
| microprobe analysis |
Zaykov et al. (2017) | |
| Tolstykh et al. (2000) |
| Nesterenko +6 other references |
| Cabri et al. (1997) +1 other reference |
| Groshev +6 other references |
Groshev +7 other references | |
Groshev +7 other references | |
| Chashchin et al. (2018) |
| Grishaenko et al. (2007) |
| Okrugin (1998) |
Sierra Leone | |
| Bowles et al. (2018) |
South Africa | |
| OberthĂŒr et al. (2021) |
| OberthĂŒr et al. (2018) |
| Hutchinson et al. (2005) |
Hutchinson et al. (2005) | |
UK | |
| Power et al. (2000) |
| Prichard et al. (1988) +1 other reference |
Zaccarini F et al. (PGE) +2 other references | |
USA | |
| Anthony et al. (1990) |
| Bart Cannon (Cannon Microprobe, Seattle) |
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