Leadamalgam Mineral Data

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General Leadamalgam Information

Chemical Formula:

HgPb2

Composition:

Molecular Weight = 614.99 gm

Mercury 32.62 % Hg

Lead 67.38 % Pb

______

100.00 %

Empirical Formula:

HgPb₂

Environment:

In heavy concentrates of crushed ores from a platinum-bearing Cu-Ni sulfide deposit.

IMA Status:

Approved IMA 1985

Locality:

Shiaonanshan, Inner Mongolia Autonomous region, China. Link to MinDat.org Location Data.

Name Origin:

Named as the natural alloy of lead and mercury.

Name Pronunciation:

Leadamalgam + Pronunciation

Synonym:

Altmarkite

Leadamalgam Image

Images:

Leadamalgam

Comments: Dark gray coatings of leadamalgam on weathered ore rock.
Location: Mina Bambollita, Moctezuma, Sonora, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Leadamalgam Crystallography

Axial Ratios:

a:c = 1:1.27644

Cell Dimensions:

a = 3.545, c = 4.525, Z = 1; V = 56.87 Den(Calc)= 17.96

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm

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

By Intensity(I/I_o): 1.4(1), 1.49(1), 2.49(0.5),

Physical Properties of Leadamalgam

Color:

Silver white.

Diaphaneity:

Opaque

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Metallic

Optical Properties of Leadamalgam

RL Color:

Yellowish white.

RL Pleochroism:

Weak, bluish gray to pale bluish gray.

Calculated Properties of Leadamalgam

Electron Density:

Bulk Density (Electron Density)=14.3 gm/cc
note: Specific Gravity of Leadamalgam =18.0 gm/cc.

Fermion Index:

Fermion Index = 0.24
Boson Index = 0.76

Photoelectric:

PE_Leadamalgam=1,885.33 barns/electron
U=PE_Leadamalgam x rElectron Density=26868.57 barns/cc.

Radioactivity:

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

Leadamalgam Classification

Dana Class:

01.01.10.01 (01)Native Elements

(01.01)with metallic elements other than the platinum group

(01.01.10)Lead Amalgam Alloys

01.01.10.01 Leadamalgam HgPb2 I 4/mmm 4/m 2/m 2/m

Strunz Class:

01.AD.30 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.30 Leadamalgam HgPb2 I 4/mmm 4/m 2/m 2/m

Other Leadamalgam Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

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

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Leadamalgam

HgPb2
Dana No: 01.01.10.01 Strunz No: 01.AD.30
Locality:

Notes: