Hunchunite
A valid IMA mineral species
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About Hunchunite
Formula:
Au2Pb
Colour:
Silver grey
Lustre:
Metallic
Hardness:
3½
Specific Gravity:
15.99 (Calculated)
Crystal System:
Isometric
Name:
For its occurrence along the Hunchun River, China.
This page provides mineralogical data about Hunchunite.
Unique Identifiers
Mindat ID:
1949
Long-form identifier:
mindat:1:1:1949:7
GUID
(UUID V4):
(UUID V4):
1a3821cb-a597-4d4d-b5f9-9e7b919163b6
IMA Classification of Hunchunite
Approved
First published:
1992
Classification of Hunchunite
1.AA.25
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
A : Copper-cupalite family
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
A : Copper-cupalite family
Dana 7th ed.:
1.3.3.2
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 |
---|---|---|
Hcn | 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 Hunchunite
Metallic
Transparency:
Opaque
Colour:
Silver grey
Comment:
Readily oxidizes to a dull gray.
Hardness:
3½ on Mohs scale
Hardness:
VHN5=128 - 149 kg/mm2 - Vickers
Density:
15.99 g/cm3 (Calculated)
Optical Data of Hunchunite
Reflectivity:
Wavelength | R |
---|---|
405nm | 40.9% |
436nm | 48.8% |
480nm | 58.4% |
526nm | 57.9% |
546nm | 59.5% |
589nm | 60.0% |
644nm | 64.0% |
656nm | 60.0% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 64.0%.
Colour in reflected light:
Silver-gray
Chemistry of Hunchunite
Mindat Formula:
Au2Pb
Elements listed:
Crystallography of Hunchunite
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Cell Parameters:
a = 7.93 Å
Unit Cell V:
498.68 ų (Calculated from Unit Cell)
Z:
8
Comment:
Fd3m - by analogy to synthetic Au2Pb
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.391 Å | (100) |
2.810 Å | (30) |
1.196 Å | (26) |
2.301 Å | (24) |
1.526 Å | (23) |
4.595 Å | (21) |
1.402 Å | (19) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
26 : Hadean detrital minerals | |
Stage 5: Initiation of plate tectonics | <3.5-2.5 |
40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Hunchunite
General Appearance of Type Material:
Anhedral granular aggregates, 170-500 x 3-30 µm.
Place of Conservation of Type Material:
National Geological Museum, Beijing, China.
Geological Setting of Type Material:
Quaternary alluvial placers.
Associated Minerals at Type Locality:
Reference:
Wu, S., Yang, Y., Song, Q. (1992) A new gold mineral - Hunchunite (Au2Pb). Acta Mineralogica Sinica: 12(4): 319-322.
Synonyms of Hunchunite
Other Language Names for Hunchunite
Related Minerals - Strunz-mindat Grouping
1.AA.05 | Aluminium | Al |
1.AA.05 | Copper | Cu |
1.AA.05 | Gold | Au |
1.AA.05 | Lead | Pb |
1.AA.05 | Nickel | Ni |
1.AA.05 | Silver | Ag |
1.AA.05 | UM2004-08-E:AuCuPd | Cu2PdAu |
1.AA.05 | UM1991-06-E:AuCu | Au3Cu |
1.AA.05 | Copper Group | |
1.AA.05 | Steinhardtite | Al0.38Ni0.32Fe0.30 |
1.AA.05a | Auricupride Subgroup | |
1.AA.10a | Auricupride | Cu3Au |
1.AA.10b | Tetra-auricupride | AuCu |
1.AA.10a | Cuproauride | Cu3Au |
1.AA.10 | Nickel Group | |
1.AA.15 | Anyuiite | AuPb2 |
1.AA.15 | Khatyrkite | (Cu,Zn)Al2 |
1.AA.15 | Novodneprite | AuPb3 |
1.AA.15 | UM1985-02-E:AlZn | (Zn,Cu)Al2 |
1.AA.20 | Cupalite | (Cu,Zn)Al |
1.AA.30 | Stolperite | AlCu |
1.AA.35 | Hollisterite | Al3Fe |
1.AA.40 | Icosahedrite | Al63Cu24Fe13 |
1.AA.45 | Kryachkoite | (Al,Cu)6(Fe,Cu) |
1.AA.50 | Proxidecagonite | Al34Ni9Fe2 |
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 Hunchunite
mindat.org URL:
https://www.mindat.org/min-1949.html
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Please feel free to link to this page.
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References for Hunchunite
Reference List:
Localities for Hunchunite
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.
China | |
| Guanxiang Song (1991) |
| Wu Shangquan et al. (1992) |
Finland | |
| Molnár +3 other references |
Russia | |
| Sandimirova et al. (2014) |
| Tatyana V. Svetlitskaya (2017) |
| Witzke (2023) |
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Nizhnii Tagil, Sverdlovsk Oblast, Russia