Atheneite Mineral Data (original) (raw)

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 Atheneite Image in a New Browser Window Images:

Click Here for Larger Atheneite Image Atheneite 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 DipyramidalH-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 R 2 ∑ 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

RelativeIntensity 0% 20% 40% 60% 80% 100% 120% 140% 160% 180%
R1
R2

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:

02.02.04.01 (02)Sulfides - Including Selenides and Tellurides

(02.02)where Am Bn Xp, with (m+n):p=3:1

(02.02.04)Dana Group

02.02.04.01 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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Ask about Atheneite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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

Atheneite

(Pd,Hg)3As
Dana No: 02.02.04.01 Strunz No: 02.AC.05a
Locality:

Notes: