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Yiyangite

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Formula:
Au3Hg
Colour:
yellow
Lustre:
Metallic
Crystal System:
Hexagonal
Name:
For the discovery locality in Yiyang City of Hunan Province, China.
One of several gold amalgams reported so far.


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Classification of YiyangiteHide

Notes:
Unnamed (probably valid)
Approval History:
Unnamed, but probably valid.

Physical Properties of YiyangiteHide

Metallic
Transparency:
Opaque
Colour:
yellow
Hardness:
VHN50=35.3 kg/mm2 - Vickers

Optical Data of YiyangiteHide

Type:
Anisotropic
Anisotropism:
weak
Bireflectance:
weak
Reflectivity:
430nmR=29.5%
480nmR=44.8%
530nmR=56.8%
590nmR=67.1%
660nmR=70.7%
700nmR=67.2%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 70.7%.
Colour in reflected light:
yellow-white
Pleochroism:
Weak

Chemical Properties of YiyangiteHide

Formula:
Au3Hg

Crystallography of YiyangiteHide

Crystal System:
Hexagonal
Cell Parameters:
a = 2.19 Å, c = 4.815 Å
Ratio:
a:c = 1 : 2.199
Unit Cell V:
20.00 ų (Calculated from Unit Cell)

First Recorded Occurrence of YiyangiteHide

Geological Setting of First Recorded Material:
Alluvial placer deposit.

Other Language Names for YiyangiteHide

Simplified Chinese:益阳矿

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 YiyangiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Shuzhang Tian (1989): Discovery and study of gold-mercury series minerals, lead-gold-tellurium-bismuth minerals and maldonite. Gold Geology 8(1), 78-83 (in Chinese with English abstract).
Enkui Cao (1991): The discovery and research of yiyangite in the Hanjiang river. Geology of Shaanxi 9(1), 88-92 (in Chinese with English abstract).
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 YiyangiteHide

Localities for YiyangiteHide

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.
China (FRL)
 
  • Hunan
    • Yiyang
      • Heshan District
Shuzhang Tian (1989): Gold Geology 8(1), 78-83
  • Shaanxi
    • Hanzhong
      • Mian County
Enkui Cao (1991): Geology of Shaanxi 9(1), 88-92
 
Mineral and/or Locality  
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