Weishanite Mineral Data

Weishanite Mineral Data +

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General Weishanite Information

Chemical Formula:

(Au,Ag)3Hg2

Composition:

Molecular Weight = 925.26 gm

Silver 8.74 % Ag

Mercury 43.36 % Hg

Gold 47.90 % Au

______

100.00 %

Empirical Formula:

Au_2.25Ag_0.75Hg₂

Environment:

In the silicified zone of the silver-rich part of an Au-Ag deposit in biotite granulte.

IMA Status:

Approved IMA 1984

Locality:

Weishan, Poshan mining district,Tongbai County, Henan Province, China. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

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Weishanite Crystallography

Axial Ratios:

a:c = 1:1.64626

Cell Dimensions:

a = 2.9265, c = 4.8178, Z = 0.25; V = 35.73 Den(Calc)= 10.75

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 2.243(1), 0.9396(0.9), 1.3593(0.8),

Physical Properties of Weishanite

Cleavage:

None

Color:

Light yellow.

Diaphaniety:

Opaque

Fracture:

Malleable - Deforms rather than breaking apart with a hammer.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Streak:

light yellow

Optical Properties of Weishanite

RL Anisotrophism:

Weak.

RL Pleochroism:

Weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Weishanite in Air**
λ	R	∑ R(λ)
480 nm	63.75
534 nm	76.30
589 nm	81.03
656 nm	68.60

**Calculated Relative Intensity Colors of Weishanite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%
R

Calculated Properties of Weishanite

Electron Density:

r_electron=8.67 gm/cc
note: r_Weishanite=10.8 gm/cc.

Fermion Index

Fermion Index = 0.13094
Boson Index = 0.86906

Photoelectric:

PE_Weishanite=1,594.03 barns/electron
U=PE_Weishanite x r_electron=13816.02 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Weishanite is Not Radioactive

Weishanite Classification

Dana Class:

1.1.8.6 (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.02-80 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 Weishanite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Am.Min.,Vol.73,p196,1988) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Weishanite :
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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Weishanite

(Au,Ag)3Hg2
Dana No: 1.1.8.6 Strunz No: I/A.02-80
Locality:

Notes: