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Eugenite

A valid IMA mineral species
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About EugeniteHide

06044200017271922779258.jpg
Eugen F. Stumpfl
Formula:
Ag11Hg2
Colour:
Black, silver, bronze
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
10.75
Crystal System:
Isometric
Name:
Named in honor of Eugen Friedrich Stumpfl (27 November 1931, Munich, Germany - 12 July 2004, Innsbruck, Austria), professor of mineralogy, Mining Institute, Leoben (Austria), for his studies of noble metal compounds. The mineral stumpflite is also named after him.
This page provides mineralogical data about Eugenite.


Unique IdentifiersHide

Mindat ID:
1422
Long-form identifier:
mindat:1:1:1422:5

Similar NamesHide

AuganiteA synonym of 'Augite andesite'
Euxenite-(Y)A valid IMA mineral species - grandfathered(Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6
Euxenite-(Y)-Columbite solid solutionA solid-solution series between two end-member minerals

IMA Classification of EugeniteHide

Classification of EugeniteHide

1.AD.15c

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
D : Mercury-amalgam family
Dana 7th ed.:
1.1.11.5
1.1.8.5

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1.15

1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
EugIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of EugeniteHide

Metallic
Transparency:
Opaque
Colour:
Black, silver, bronze
Hardness:
2½ - 3 on Mohs scale
Hardness:
VHN15=85.8 - 106 kg/mm2 - Vickers
Density:
10.75(3) g/cm3 (Measured)    10.45 g/cm3 (Calculated)

Optical Data of EugeniteHide

Type:
Isotropic
Reflectivity:
WavelengthR1 (%)
546nm80.1%
589nm82.7%
656nm85.6%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 85.6%.
Colour in reflected light:
White with a faint yellow tinge

Chemistry of EugeniteHide

Mindat Formula:
Ag11Hg2
Element Weights:
Element% weight
Ag74.733 %
Hg25.268 %

Calculated from ideal end-member formula.
Ag
Hg

Crystallography of EugeniteHide

Crystal System:
Isometric
Class (H-M):
43m - Hextetrahedral
Space Group:
I43m
Cell Parameters:
a = 10.02(2) Å
Unit Cell V:
1,006.01 ų (Calculated from Unit Cell)
Z:
4

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0014123EugeniteOwen E A, O'Donnell Roberts E A (1945) The solubility of certain metals in gold Journal of the Institute of Metals 71 213-25419450293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.37 Å(100)
2.10 Å(80)
1.457 Å(70)
1.240 Å(70)
1.193 Å(60)
1.033 Å(50)
0.950 Å(80)
0.925 Å(80)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of EugeniteHide

General Appearance of Type Material:
Grains up to 4 mm
Place of Conservation of Type Material:
Institute of Geology and Mineral Deposits, Cracow, Poland.
Associated Minerals at Type Locality:

Synonyms of EugeniteHide

Other Language Names for EugeniteHide

Dutch:Eugeniet
German:Eugenit
Spanish:Eugenita

Relationship of Eugenite to other SpeciesHide

Other Members of Silver Amalgam Group:
LuanheiteAg3HgHex.
ParaschachneriteAg3Hg2Orth.
SchachneriteAg1.1Hg0.9Hex. 6/mmm(6/m2/m2/m) : P63/mmc

Common AssociatesHide

Associations Based on Photo Data:
7 photos of Eugenite associated with LuanheiteAg3Hg
2 photos of Eugenite associated with NickelineNiAs
2 photos of Eugenite associated with 'Amalgam'(Ag,Hg)
1 photo of Eugenite associated with AcanthiteAg2S
1 photo of Eugenite associated with Kenoargentotetrahedrite-(Fe)[Ag6]4+(Cu4Fe2+2)Sb4S12◻
1 photo of Eugenite associated with Argentopolybasite[Ag6Sb2S7][Ag9AgS4]

Related Minerals - Strunz-mindat GroupingHide

1.AD.AurihydrargyrumiteAu6Hg5Hex. 6/mmm(6/m2/m2/m) : P63/mcm
1.AD.05Native MercuryHgAmor.
1.AD.10BelendorffiteCu7Hg6Trig. 3m : R3m
1.AD.10KolymiteCu7Hg6Iso.
1.AD.15aParaschachneriteAg3Hg2Orth.
1.AD.15bLuanheiteAg3HgHex.
1.AD.15aSchachneriteAg1.1Hg0.9Hex. 6/mmm(6/m2/m2/m) : P63/mmc
1.AD.15dMoschellandsbergiteAg2Hg3Iso. m3m(4/m32/m)
1.AD.20b'Goldamalgam (of Chen et al.)'(Au,Ag)HgIso. m3m(4/m32/m) : Im3m
1.AD.20aWeishanite(Au,Ag,Hg)Hex. 6/mmm(6/m2/m2/m) : P63/mmc
1.AD.20c'Yiyangite'Au3HgHex.
1.AD.25PotaritePdHgTet. 4/mmm(4/m2/m2/m) : P4/mmm
1.AD.30LeadamalgamPb0.7Hg0.3Tet. 4/mmm(4/m2/m2/m) : I4/mmm
1.AD.35ShosanbetsuiteAg3SnOrth. mmm(2/m2/m2/m) : Pmmn
1.AD.40'Unnamed (Au-Hg Amalgam)'Au2HgHex. 6/mmm(6/m2/m2/m) : P63/mcm

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.

Internet Links for EugeniteHide

References for EugeniteHide

Localities for EugeniteHide

Showing 34 localities.

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.
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Locality ListHide

- 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.
Australia
 
  • New South Wales
    • Robinson Co.
      • Cobar
Leverett et al. (2005)
Austria
 
  • Tyrol
    • Kitzbühel District
      • Oberndorf in Tirol
Steiner et al. (2010)
  • Vorarlberg
    • Bludenz District
      • Silbertal
        • Kristbergsattel
Krause et al. (2025)
Chile
 
  • Atacama
    • Copiapó Province
      • Tierra Amarilla
        • Pabellón
          • Elisa de Bordos
The Stratabound Tuff-hosted Elisa de ... +1 other reference
China
 
  • Guangdong
    • Foshan
      • Gaoming District
        • Changkeng-Fuwan Au-Ag deposit
Puritch et al. (2005)
  • Inner Mongolia
    • Chifeng City (Ulanhad League; Chifeng Prefecture)
      • Bairin Left Banner (Balin Zuoqi)
Dai et al. (2022)
  • Jiangxi
    • Yingtan
      • Guixi Co.
        • Lengshuikeng Ag-Pb-Zn-Au deposit
Ran Lu et al. (2012)
Germany
 
  • Rhineland-Palatinate
    • Birkenfeld
      • Baumholder
        • Baumholder
www.mineralienfreunde-der-pfalz.de (2012)
Schramm et al. (2023)
  • Thuringia
    • Gotha District
      • Tambach-Dietharz
www.mineralienatlas.de (2026)
Mongolia
 
  • Ömnögovi Province
    • Khanbogd District
      • Erdenetsogt
        • Oyu Tolgoi Cu-Au ore field (Turquoise Hill Cu-Au ore field)
Khashgerel et al. (2008)
Morocco
 
  • Drâa-Tafilalet Region
Weiß (2006)
    • Tinghir Province
      • Tinghir Cercle
        • Imiter mining district
Barral et al. (2008)
  • Souss-Massa Region
    • Taroudant Province
      • Igherm Cercle
        • Adas Caïdat
Poot +7 other references
Myanmar
 
  • Mandalay Region
    • Kyaukse District
      • Kyaukse Township
Aung Myo et al. (2019) +1 other reference
Namibia
 
  • Oshikoto Region
    • Tsumeb
RRUFF database XRD confirmed
Norway
 
  • Buskerud
    • Flesberg
      • Vinoren Silver Mine Field
        • Vinoren Southern Mines
Kullerud et al. (2020)
Poland (TL)
 
  • Lower Silesian Voivodeship
    • Głogów County
      • Gmina Jerzmanowa
        • Bądzów
KGHM Polska Miedź
    • Kamienna Góra County
      • Gmina Marciszów
Mederski et al. (2020)
          • Ciechanowice field
Siuda (2012)
Mochnacka et al. (2012)
Piestrzyński et al. (2012)
    • Lubin County
Kucha H. 2007: Mineralogia kruszcowa i ...
Piestrzyński et al. (1992)
  • Lubusz Voivodeship
    • Zielona Góra County
Krzeminski (2015, August)
Russia
 
  • Sakha
www.encyclopedia.com (n.d.)
Slovakia
 
  • Banská Bystrica Region
    • Lučenec District
      • Lovinobaňa
Ferenc Š. et al. (2014)
Sweden
 
  • Västerbotten County
    • Lycksele
Rincon (2022)
  • Västmanland County
    • Sala Municipality
      • Sala
Holmgren (2002)
USA
 
  • Arizona
    • Cochise County
Graeme (1993)
        • Hendricks Gulch
Anthony et al. (1995)
  • Michigan
    • Baraga County
      • Huron River
Travis Olds collection +1 other reference
    • Menominee County
Quigley +1 other reference
  • Washington
    • Ferry County
      • Republic Mining District
Robert C. Smith
 
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