Goldamalgam (of Chen et al.)
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Formula:
(Au,Ag)Hg
Colour:
Brass yellow
Lustre:
Metallic
Hardness:
3
Crystal System:
Isometric
Name:
For the composition, being a gold amalgam.
Unique Identifiers
Mindat ID:
6974
Long-form identifier:
mindat:1:1:6974:4
Similar Names
IMA Classification of Goldamalgam (of Chen et al.)
IMA status notes:
Rejected by the IMA
Classification of Goldamalgam (of Chen et al.)
1.AD.20b
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
D : Mercury-amalgam family
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
D : Mercury-amalgam family
1.1.12.1
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
Physical Properties of Goldamalgam (of Chen et al.)
Metallic
Transparency:
Opaque
Colour:
Brass yellow
Hardness:
3 on Mohs scale
Hardness:
VHN20=77 - 79 kg/mm2 - Vickers
Tenacity:
Malleable
Optical Data of Goldamalgam (of Chen et al.)
Type:
Isotropic
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 430nm | 47.13% | 33.8% |
| 480nm | 53.73% | 46.5% |
| 530nm | 62.71% | 56.4% |
| 590nm | 66.95% | 62.53% |
| 660nm | 67.76% | 63.53% |
| 700nm | 72.14% | 71.31% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 72.14%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Pale brown
Chemistry of Goldamalgam (of Chen et al.)
Mindat Formula:
(Au,Ag)Hg
Element Weights:
| Element | % weight |
|---|---|
| Hg | 50.456 % |
Calculated from ideal end-member formula.
Elements listed:
Crystallography of Goldamalgam (of Chen et al.)
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Im3m
Cell Parameters:
a = 10.01 Å
Unit Cell V:
1,003.00 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.38 Å | (10) |
| 2.22 Å | (10) |
| 2.12 Å | (5) |
| 1.45 Å | (6) |
| 1.24 Å | (8) |
Synonyms of Goldamalgam (of Chen et al.)
Gold Amalgam (in part)
Other Language Names for Goldamalgam (of Chen et al.)
Simplified Chinese:r-金汞齐
Related Minerals - Strunz-mindat Grouping
| 1.AD. | Aurihydrargyrumite | Au6Hg5 |
| 1.AD.05 | Native Mercury | Hg |
| 1.AD.10 | Belendorffite | Cu7Hg6 |
| 1.AD.10 | Kolymite | Cu7Hg6 |
| 1.AD.15a | Paraschachnerite | Ag3Hg2 |
| 1.AD.15c | Eugenite | Ag11Hg2 |
| 1.AD.15b | Luanheite | Ag3Hg |
| 1.AD.15a | Schachnerite | Ag1.1Hg0.9 |
| 1.AD.15d | Moschellandsbergite | Ag2Hg3 |
| 1.AD.20a | Weishanite | (Au,Ag,Hg) |
| 1.AD.20c | 'Yiyangite' | Au3Hg |
| 1.AD.25 | Potarite | PdHg |
| 1.AD.30 | Leadamalgam | Pb0.7Hg0.3 |
| 1.AD.35 | Shosanbetsuite | Ag3Sn |
| 1.AD.40 | 'Unnamed (Au-Hg Amalgam)' | Au2Hg |
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 Goldamalgam (of Chen et al.)
mindat.org URL:
https://www.mindat.org/min-6974.html
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References for Goldamalgam (of Chen et al.)
Reference List:
Localities for Goldamalgam (of Chen et al.)
Showing 3 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
China | |
| Keqiao Chen et al. (1981) |
Philippines | |
| Huang (2011) |
USA | |
| Petrov (n.d.) +1 other reference |
