Eugenite Mineral Data

General Eugenite Information

Chemical Formula:

Ag9Hg2

Composition:

Molecular Weight = 1,371.99 gm

Silver 70.76 % Ag

Mercury 29.24 % Hg

______

100.00 %

Empirical Formula:

Ag₉Hg₂

IMA Status:

Approved IMA 1986

Locality:

Sieroszowice copper mine, Lubin-Sieroszowice distr., Poland. Link to MinDat.org Location Data.

Name Origin:

Named for Eugen Friedrich Stumpfl (1931-), Mineralogist, Mining University Leoben, Austria.

Name Pronunciation:

Eugenite

Eugenite Image

Images:

Eugenite

Comments: Metallic, silvery eugenite.
Location: Copiapó, Atacama, Chile. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Eugenite

Comments: Brassy, silvery eugenite alteration of leaf silver to 4mm.
Location: Elisa de Bordos mine, Copiapó, Atacama Province, Chile. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Eugenite Crystallography

Cell Dimensions:

a = 10.02, Z = 4; V = 1,006.01 Den(Calc)= 9.06

Crystal System:

Isometric - Hextetrahedral H-M Symbol (4 3m) Space Group: I 43m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.37(1), 0.95(0.8), 2.1(0.8),

Physical Properties of Eugenite

Color:

Silver white.

Density:

10.75

Diaphaneity:

Opaque

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Metallic

Streak:

metallic

Calculated Properties of Eugenite

Electron Density:

Bulk Density (Electron Density)=7.70 gm/cc
note: Specific Gravity of Eugenite =9.06 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_Eugenite= 676.73 barns/electron
U=PE_Eugenite x rElectron Density=5,210.60 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Eugenite is Not Radioactive

Eugenite Classification

Dana Class:

01.01.08.05 (01)Native Elements

(01.01)with metallic elements other than the platinum group

(01.01.08)Silver Amalgam Alloys

01.01.08.00 Amalgam* Ag2Hg3 Unk Cubic

01.01.08.01 Moschellandsbergite Ag2Hg3 I m3m 4/m 3 2/m

01.01.08.02 Schachnerite Ag1.1Hg0.9 P 6₃/mmc 6/m 2/m 2/m

01.01.08.03 Paraschachnerite Ag3Hg2 C mcm 2/m 2/m 2/m

01.01.08.04 Luanheite Ag3Hg P 6₃/mmc 6/m 2/m 2/m

01.01.08.05 Eugenite Ag9Hg2 I 43m 4 3m

01.01.08.06 Weishanite (Au,Ag)3Hg2 P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

01.AD.15c 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)

01.A - Metals and Intermetallic Alloys

01.AD -Mercury-amalgam family

01.AD.15c Eugenite Ag9Hg2 I 43m 4 3m

Other Eugenite Information

References:

NAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996)

See Also:

Links to other databases for Eugenite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Eugenite Specimen Label here :

Eugenite

Ag9Hg2
Dana No: 01.01.08.05 Strunz No: 01.AD.15c
Locality:

Notes:

Dakota Matrix
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