Yuanjiangite
A valid IMA mineral species
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About Yuanjiangite
Formula:
AuSn
Colour:
Silver-white
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
11.7 - 11.9
Crystal System:
Hexagonal
Name:
Named after its type locality on the Yuan River (Yuan Jiang), in Yuanling county, Hunan Province, China.
Hexagonal prisms and anhedral grains.
Unique Identifiers
Mindat ID:
7381
Long-form identifier:
mindat:1:1:7381:9
GUID
(UUID V4):
(UUID V4):
cf266f30-fc12-461a-b7fb-d9b4c40f0a16
IMA Classification of Yuanjiangite
Approved
Approval year:
1993
First published:
1994
Classification of Yuanjiangite
1.AC.15
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
C : Indium-tin family
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
C : Indium-tin family
Dana 7th ed.:
1.1.4.1
1.1.2.3
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
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 |
---|---|---|
Yjg | 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 Yuanjiangite
Metallic
Transparency:
Opaque
Colour:
Silver-white
Comment:
Readily oxidizes to gray or black in air.
Streak:
Black
Hardness:
3½ - 4 on Mohs scale
Hardness:
VHN25=172 - 274 kg/mm2 - Vickers
Tenacity:
Malleable
Cleavage:
None Observed
Density:
11.7 - 11.9 g/cm3 (Measured) 11.78 g/cm3 (Calculated)
Optical Data of Yuanjiangite
Anisotropism:
distinct
Bireflectance:
faint
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
400nm | 55.0% | 55.0% |
420nm | 57.2% | 57.5% |
440nm | 60.2% | 60.6% |
460nm | 63.6% | 63.7% |
480nm | 67.1% | 66.7% |
500nm | 70.5% | 69.6% |
520nm | 73.5% | 72.0% |
540nm | 76.1% | 74.3% |
560nm | 78.2% | 76.1% |
580nm | 79.9% | 77.4% |
600nm | 81.1% | 78.4% |
620nm | 81.9% | 79.0% |
640nm | 82.5% | 79.4% |
660nm | 83.1% | 79.6% |
680nm | 83.4% | 79.8% |
700nm | 83.6% | 80.0% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 83.6%.
R1 shown in black, R2 shown in red
Colour in reflected light:
silver white with a slight yellowish
Chemistry of Yuanjiangite
Mindat Formula:
AuSn
Elements listed:
Crystallography of Yuanjiangite
Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P63/mmc
Setting:
P63/mmc
Cell Parameters:
a = 4.316(1) Å, c = 5.510(2) Å
Ratio:
a:c = 1 : 1.277
Unit Cell V:
88.89 ų (Calculated from Unit Cell)
Z:
2
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
---|---|---|---|---|---|---|---|
0011561 | Yuanjiangite | Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 85-237 | 1963 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.726 Å | (34) |
3.087 Å | (38) |
2.218 Å | (100) |
2.1 59 Å | (57) |
1.546 Å | (310 |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Yuanjiangite
General Appearance of Type Material:
Crystalline granular aggregates that form nodular, pseudobotryoidal forms to 2 mm, with individual grains generally <5 µm; also rarely as slightly larger hexagonal prisms in drusy cavities.
Place of Conservation of Type Material:
Geological Museum of China, Beijing, and in the China University of Geosciences, Beijing
Geological Setting of Type Material:
Gold and PGE placer.
Associated Minerals at Type Locality:
Reference:
Chen Lichang, Tang Cuiqing, Zhang Jianhong, and Liu Zhenyun (1994) Yuanjiangite - A new auriferous and stanniferous mineral. Acta Petrologica et Mineralogica 13(3), 232-238
Synonyms of Yuanjiangite
Other Language Names for Yuanjiangite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
1.AC.05 | Indium | In |
1.AC.10 | Tin | Sn |
1.AC.15 | Eta-bronze | Cu6Sn5 |
1.AC.15 | Sorosite | Cu1+x(Sn,Sb) |
1.AC.15 | UM1965-07-E:CuSn | Cu3Sn |
1.AC.20 | Rumoiite | AuSn2 |
Other Information
Notes:
Readily soluble in aqua regia, slowly soluble in HCl or HNO3.
Special Storage/
Display Requirements:
Display Requirements:
readily oxidizes in air
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 Yuanjiangite
mindat.org URL:
https://www.mindat.org/min-7381.html
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Please feel free to link to this page.
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References for Yuanjiangite
Localities for Yuanjiangite
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 (TL) | |
| Chen Lichang et al. (1994) |
Japan | |
| Nishio-Hamane et al. (2021) |
Russia | |
| Sandimirova et al. (2014) |
| Ханчук А.И. et al. (Приморье) |
Uzbekistan | |
| GEOCHMISTRY |
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