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Goldamalgam

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Anna adit, Mitterberg District, Mühlbach am Hochkönig, St Johann im Pongau, Salzburg, Austria

Formula:
(Au,Ag)Hg
System:IsometricColour:Brass yellow
Lustre:MetallicHardness:3
This page provides mineralogical data about Goldamalgam.

Classification of Goldamalgam

IMA status:Rejected
Strunz 8th edition ID:1/A.02-20
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:1.1.12.1

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
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Physical Properties of Goldamalgam

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Brass yellow
Hardness (Mohs):3
Hardness (Vickers):VHN5=150 kg/mm2
Tenacity:Malleable

Crystallography of Goldamalgam

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Im3m {I4/m 3 2/m}
Cell Parameters:a = 10.01Å
Unit Cell Volume:V 1,003.00 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
2.38 (10)
2.22 (10)
2.12 (5)
1.45 (6)
1.24 (8)

Optical Data of Goldamalgam

Type:Isotropic
Reflectivity:
546 nmR=62.1%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 62.1%.
Colour in reflected light:Pale brown

Chemical Properties of Goldamalgam

Formula:
(Au,Ag)Hg
Essential elements:Au, Hg
All elements listed in formula:Ag, Au, Hg
Analytical Data:Electron microprobe analysis of material from Hebei Province, China.
Au  (36.64)
Ag   (9.16)
Hg  (53.17)

sum  98.97 wt.-%
Empirical Formula:
(Au
 
0.69
Ag
 
0.31
 )Hg
 
0.98

Relationship of Goldamalgam to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
1.AD.05Mercury
Hg
1.AD.10Belendorffite
Cu
 
7
Hg
 
6
1.AD.10Kolymite
Cu
 
7
Hg
 
6
1.AD.15cEugenite
Ag
 
11
Hg
 
2
1.AD.15bLuanheite
Ag
 
3
Hg
1.AD.15dMoschellandsbergite
Ag
 
2
Hg
 
3
1.AD.15aParaschachnerite
Ag
 
3
Hg
 
2
1.AD.15aSchachnerite
Ag
 
1.1
Hg
 
0.9
1.AD.20aWeishanite
(Au,Ag)
 
3
Hg
 
2
1.AD.25Potarite
PdHg
1.AD.30Leadamalgam
HgPb
 
2

Other Names for Goldamalgam

Synonyms:
Gold AmalgamMercurygold
Other Languages:

Other Information

Health Warning: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

Reference List: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.

Chen Keqiao, Yang Huifang, Ma Letian and Peng Zhizhong (l98l): 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).

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    Localities for Goldamalgam

    Hide Locality List
    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Austria
     
    • Salzburg
      • St Johann im Pongau
        • Mühlbach am Hochkönig
          • Mitterberg District
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    Bolivia
     
    • Potosí Department
      • Sud Lípez Province
        • Cerro Bonete
    		D. Richter, et al (1992) Cerro Bonete Area. (in USGS Bulletin # 1975) (pers. comm. Hernan Uribe, 1990)
    China
     
    • Hebei Province
      • Chengde Prefecture
        • Longhua Co.
    		Chen Keqiao, Yang Huifang, Ma Letian and Peng Zhizhong (1981): Dizhi Pinglun 27, 107-115.
    Finland
     
    • Lapin (Lapland) Lääni
      • Kittilä
    		No reference listed
      • Ylivieska
    		No reference listed
    France
     
    • Pays de Loire
      • Mayenne
        • Montenay
    		P. Devismes : "Atlas photographique des minéraux d'alluvions", BRGM, 1978.
    Sweden
     
    • Lappland
      • Gällivare
        • Aitik
    		No reference listed
    • Västerbotten
      • Boliden
    		No reference listed
    No reference listed
    USA
     
    • Arizona
      • Yavapai Co.
        • Sierra Prieta Mts
          • Copper Basin District
            • Kirkland area
              • Copper Basin Wash
    		AZ Bur. of Mines Bull. 135 (1933), AZ Gold Placers & Placering: 41-44.
    • California
      • Mariposa Co.
        • Bagby-Mariposa-Mount Bullion-Whitlock District
          • Mariposa
    		Schmitz (1852), Goldamalgan in Caifornien, letter to V. Gerolt: Deut. Geol. Ges., Zeitschr. 4: 713; Sonnenschein, F. (1854), Ueber das Vorkommen der natürlichen Goldamalgams in Californien: Deutsche geol. Gesell., Zeitschr., Band 6: 244; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 205.
    Alfredo Petrov collection; Excalibur Mineral Co. microprobe ID.
      • Nevada Co.
        • Nevada City District (Grass Valley District)
          • Nevada City
    		Lindgren, Waldemar (1896a), The gold-quartz veins of Nevada City and Grass Valley districts, California: USGS 17th. Annual Report, part 2: 1-262: 116; Lindgren, Waldemar (1911), The Tertiary gravels of the Sierra Nevada of California: USGS pp 73, 226 pp.: 75; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 149, 205.
    • Colorado
      • Boulder Co.
        • Gold Hill District
    		Minerals of Colorado (1997) Eckels, E. B.
      • San Miguel Co.
        • Ophir District
    		Minerals of Colorado (1997) Eckels, E. B.
    Uzbekistan
     
    • Kyzylkum Desert
      • Central Kyzylkum Region
        • Bel'tau Mts
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
    Google
     
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