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Goldamalgam (of Chen et al.)

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Brass yellow
Crystal System:
For the composition, being a gold amalgam.
One of several gold amalgams reported so far.

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Classification of Goldamalgam (of Chen et al.)Hide

Rejected by the IMA

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
D : Mercury-amalgam family

1 : Metals, other than the Platinum Group

Physical Properties of Goldamalgam (of Chen et al.)Hide

Brass yellow
VHN20=77 - 79 kg/mm2 - Vickers

Optical Data of Goldamalgam (of Chen et al.)Hide

430nmR1=47.13%R2= 33.8%
480nmR1=53.73%R2= 46.5%
530nmR1=62.71%R2= 56.4%
590nmR1=66.95%R2= 62.53%
660nmR1=67.76%R2= 63.53%
700nmR1=72.14%R2= 71.31%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 72.14%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Pale brown

Chemical Properties of Goldamalgam (of Chen et al.)Hide


Crystallography of Goldamalgam (of Chen et al.)Hide

Crystal System:
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Cell Parameters:
a = 10.01 Å
Unit Cell V:
1,003.00 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
2.38 Å(10)
2.22 Å(10)
2.12 Å(5)
1.45 Å(6)
1.24 Å(8)

Other Language Names for Goldamalgam (of Chen et al.)Hide

Simplified Chinese:r-金汞齐

Related Minerals - Nickel-Strunz GroupingHide

1.AD.AurihydrargyrumiteAu6Hg5Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
1.AD.05MercuryHgTrig. 3m (3 2/m) : R3m
1.AD.15dMoschellandsbergiteAg2Hg3Iso. m3m (4/m 3 2/m)
1.AD.20aWeishanite(Au,Ag,Hg)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
1.AD.25PotaritePdHgTet. 4/mmm (4/m 2/m 2/m) : P4/mmm
1.AD.30LeadamalgamPb0.7Hg0.3Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm

Related Minerals - Dana Grouping (8th Ed.)Hide m3m (4/m 3 2/m) : Im3m (x=0.6)Iso. m3m (4/m 3 2/m) : Pm3m m3m (4/m 3 2/m) : Pm3m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Goldamalgam (of Chen et al.)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged, 834pp.: 105.
Keqiao Chen, Huifang Yang, Letian Ma, and Zhizhong Peng (1981): The discovery of two new minerals - goldamalgam and leadamalgam. Dizhi Pinglun 27, 107-115 (in Chinese with English abstract). - Abstracted in: American Mineralogist 70, 214-221 (1985).
Shaofeng Huang (2011): Mineralogical characteristics of gold-mercury minerals in the Davao gold placer of Mindanao islands, Phillippines, and its prospecting significance. Geology and Exploration 47(5), 935-942 (in Chinese with English abstract).

Internet Links for Goldamalgam (of Chen et al.)Hide

Localities for Goldamalgam (of Chen et al.)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Hebei
    • Chengde
      • Fengning County
        • Boluonuo
Keqiao Chen, Huifang Yang, Letian Ma, and Zhizhong Peng (1981): Dizhi Pinglun 27, 107-115
  • Mindanao
    • Southern Mindanao Region
      • Davao del Sur Province
Shaofeng Huang (2011): Geology and Exploration 47(5), 935-942
  • California
    • Mariposa Co.
Alfredo Petrov collection; Excalibur Mineral Co. microprobe ID.
Mineral and/or Locality  
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