Eugenite Mineral Data

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.

Eugenite Image

Images:

Eugenite

Comments: Metallic, silvery eugenite.
Location: Copiap?, 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, Copiap?, 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 - HextetrahedralH-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

Diaphaniety:

Opaque

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Metallic

Streak:

metallic

Calculated Properties of Eugenite

Electron Density:

r_electron=7.70 gm/cc
note: r_Eugenite=9.06 gm/cc.

Fermion Index

Fermion Index = 0.0883
Boson Index = 0.9117

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Eugenite is Not Radioactive

Eugenite Classification

Dana Class:

1.1.8.5 (1)Native Elements

(1.1)with metallic elements other than the platinum group

(1.1.8)Silver Amalgam Alloys

1.1.8.0 Amalgam* Ag2Hg3 Unk Cubic

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

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

1.1.8.3 Paraschachnerite Ag3Hg2 C mcm 2/m 2/m 2/m

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

1.1.8.5 Eugenite Ag9Hg2 I 43m 4 3m

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

Strunz Class:

I/A.02-28 I - Elements

I/A - Metallic and intermetallic compounds, Carbides, Nitrides, Phosphides and Silicides

I/A.02 - Mercury and Amalgame series

I/A.02-10 Mercury Hg R 3m 3 2/m

I/A.02-20 Kolymite Cu7Hg6 I 43m 4 3m

I/A.02-22 Belendorffite Cu7Hg6 R 3m 3m

I/A.02-28 Eugenite Ag9Hg2 I 43m 4 3m

I/A.02-30 Moschellandsbergite Ag2Hg3 I m3m 4/m 3 2/m

I/A.02-40 Luanheite Ag3Hg P 6₃/mmc 6/m 2/m 2/m

I/A.02-50 Schachnerite Ag1.1Hg0.9 P 6₃/mmc 6/m 2/m 2/m

I/A.02-60 Paraschachnerite Ag3Hg2 C mcm 2/m 2/m 2/m

I/A.02-70 Goldamalgam* (Au,Ag)Hg I m3m 4/m 3 2/m

I/A.02-80 Weishanite (Au,Ag)3Hg2 P 6₃/mmc 6/m 2/m 2/m

I/A.02-90 Potarite PdHg P 4/mmm 4/m 2/m 2/m

I/A.02-100 Leadamalgam HgPb2 I 4/mmm 4/m 2/m 2/m

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Eugenite

Ag9Hg2
Dana No: 1.1.8.5 Strunz No: I/A.02-28
Locality:

Notes: