Gold Crystallography

Published By On Monday, October 19th 2009. Under Gold Mineralization  Tags: , ,   

Gold Crystallography

Cell Dimensions:

a = 4.0786, Z = 4; V = 67.85 Den(Calc)= 19.28

Crystal System:

Isometric – Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m

X Ray Diffraction:

By Intensity(I/Io): 2.355(1), 2.039(0.52), 1.23(0.36),

Forms:

 

 

 

 

 

 

 

 

Crystal Structure:

 

 

 

 

 

 Gold Crystallography Gold Crystallography

 

       Gold Classification:

Dana Class:

1.1.1.1 (1)Native Elements

 

(1.1)with metallic elements other than the platinum group

 

(1.1.1)Gold group

 

1.1.1.1 Gold Au F m3m 4/m 3 2/m

 

1.1.1.2 Silver Ag F m3m 4/m 3 2/m

 

1.1.1.3 Copper Cu F m3m 4/m 3 2/m

 

1.1.1.4 Lead Pb F m3m 4/m 3 2/m

 

1.1.1.5 Aluminum Al F m3m,P m3m 4/m 3 2/m

Strunz Class:

I/A.01-40 I – Elements

 

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

 

I/A.01 – Series Copper, Silver and Gold

 

I/A.01-10 Copper Cu F m3m 4/m 3 2/m

 

I/A.01-15 Allabogdanite! (Fe,Ni)2P P nma 2/m 2/m 2/m

 

I/A.01-20 Silver Ag F m3m 4/m 3 2/m

 

I/A.01-40 Gold Au F m3m 4/m 3 2/m

 

I/A.01-50 Auricupride Cu3Au P m3m 4/m 3 2/m

 

I/A.01-60 Tetra-auricupride AuCu P 4/mmm 4/m 2/m 2/m

 

I/A.01-65 Bogdanovite (Au,Te,Pb)3(Cu,Fe) P m3m 4/m 3 2/m

 

I/A.01-68 Hunchunite! (Au,Ag)2Pb F d3m 4/m 3 2/m

 

I/A.01-70 Anyuiite Au(Pb,Sb)2 I 4/mcm 4/m 2/m 2/m

Occurrences of Gold:

Geological Setting:

1) Primary hydrothermal veins.
2) Volcanic.
3) Alluvial.

 Association:

Pyrite, chalcopyrite, arsenopyrite, pyrrhotite, sylvanite, krennerite, calaverite,

altaite, tetradymite, scheelite, ankerite, tourmaline, quartz. 

Abundance of Gold:

  • Earth’s Crust/p.p.m.: 0.0011

  • Seawater/p.p.m.: 0.00001

  • Atmosphere/p.p.m.: N/A

  • Sun (Relative to H=1E12): 5.6

....

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