Mineralogy Database

Atheneite Mineral Data

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General Atheneite Information

Help on Chemical  Formula: Chemical Formula: (Pd,Hg)3As
Help on Composition: Composition: Molecular Weight = 464.81 gm
   Mercury    32.37 %  Hg
   Arsenic    16.12 %  As
   Palladium  51.51 %  Pd
             100.00 % 
Help on Empirical Formula: Empirical Formula: Pd2.25Hg0.75As
Help on Environment: Environment: In concentrates from gold washings.
Help on IMA Status: IMA Status: Approved IMA 1973
Help on Locality: Locality: From Itabira, Minas Gerais, Brazil. From the area around Zlatoust, Ural Mountains, USSR. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: After the Greek goddess "Pallas Athene," in allusion to its palladium content.
Help on Name Pronunciation: Name Pronunciation: Atheneite + Pronunciation Say ATHENEITE

Atheneite Image

Click Here for Larger   Image in a New Browser Window Images:
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Comments: BSE image of Hg-bearing palladian gold (Au-Pd-Hg), Pd-poor gold and associated PGM in a Mn-Ba-O matrix (possibly romanechite, dark grey). Note that the crystals of atheneite [(Pd,Hg)3As] are on the surface of the Au-Pd-Hg alloy.
Location: Drill-core, recovered in 1982 from the near-surface lateritic portion of the Serra Pelada garimpo (1980-1984) bonanza, Carajas mineral province, Northern Brazil. (CanMin, v40:1451). Scale: See Image.
© Canadian Mineralogist

Atheneite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.51235
Help on Cell Dimensions: Cell Dimensions: a = 6.798, c = 3.483, Z = 2; V = 139.39 Den(Calc)= 11.07
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.423(1), 2.246(0.9), 1.371(0.8),

Physical Properties of Atheneite

Help on Color: Color: Gray white.
Help on Density: Density: 10.2
Help on Diaphaneity: Diaphaneity: Opaque
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Metallic

Optical Properties of Atheneite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Color: RL Color: White with bluish tint.
Help on RL Pleochroism: RL Pleochroism: Very weak, in pale yellow-white to bluish gray-white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Atheneite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   46.10   48.30 
 420 nm   47.40   49.80 
 440 nm   48.50   50.90 
 460 nm   49.70   52.40 
 480 nm   50.80   53.60 
 500 nm   51.90   54.80 
 520 nm   53.00   55.80 
 540 nm   54.00   56.70 
 560 nm   54.80   57.30 
 580 nm   55.70   57.80 
 600 nm   56.40   58.30 
 620 nm   57.00   58.50 
 640 nm   57.40   58.60 
 660 nm   57.60   58.70 
 680 nm   57.90   59.00 
 700 nm   58.20   59.10 
Calculated Relative Intensity Colors of Atheneite in Air
   0%   20%   40%   60%   80% 100% 120% 140% 160% 180%

Calculated Properties of Atheneite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=9.36 gm/cc
note: Specific Gravity of Atheneite =11.1 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.21
Boson Index = 0.79
Help on Photoelectric: Photoelectric: PEAtheneite = 681.59 barns/electron
U=PEAtheneite x rElectron Density=6,379.56 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Atheneite is Not Radioactive

Atheneite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.02)where Am Bn Xp, with (m+n):p=3:1
  (02.02.04)Dana Group Atheneite (Pd,Hg)3As P 6/mmm 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.AC.05a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.A - Simple Sulfides, Selenides, etc
  02.AC -Alloys of metalloids with PGE
02.AC.05a Atheneite (Pd,Hg)3As P 6/mmm 6/m 2/m 2/m
02.AC.05a Vincentite (Pd,Pt)3(As,Sb,Te) Unk Mono

Other Atheneite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Atheneite :
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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Dana No: Strunz No: 02.AC.05a





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