Atheneite Mineral Data

Atheneite Mineral Data +

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General Atheneite Information

Chemical Formula:

(Pd,Hg)3As

Composition:

Molecular Weight = 464.81 gm

Mercury 32.37 % Hg

Arsenic 16.12 % As

Palladium 51.51 % Pd

______

100.00 %

Empirical Formula:

Pd_2.25Hg_0.75As

Environment:

In concentrates from gold washings.

IMA Status:

Approved IMA 1973

Locality:

From Itabira, Minas Gerais, Brazil. From the area around Zlatoust, Ural Mountains, USSR. Link to MinDat.org Location Data.

Name Origin:

After the Greek goddess "Pallas Athene," in allusion to its palladium content.

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Atheneite Crystallography

Axial Ratios:

a:c = 1:0.51235

Cell Dimensions:

a = 6.798, c = 3.483, Z = 2; V = 139.39 Den(Calc)= 11.07

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/I_o): 2.423(1), 2.246(0.9), 1.371(0.8),

Physical Properties of Atheneite

Color:

Gray white.

Density:

10.2

Diaphaniety:

Opaque

Hardness:

5 - Apatite

Luster:

Metallic

Optical Properties of Atheneite

RL Anisotrophism:

Distinct.

RL Color:

White with bluish tint.

RL Pleochroism:

Very weak, in pale yellow-white to bluish gray-white.

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**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%
R₁
R₂

Calculated Properties of Atheneite

Electron Density:

r_electron=9.36 gm/cc
note: r_Atheneite=11.1 gm/cc.

Fermion Index

Fermion Index = 0.21277
Boson Index = 0.78723

Photoelectric:

PE_Atheneite= 681.59 barns/electron
U=PE_Atheneite x r_electron=6,379.56 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Atheneite is Not Radioactive

Atheneite Classification

Dana Class:

2.2.4.1 (2)Sulfides - Including Selenides and Tellurides

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

(2.2.4)Dana Group

2.2.4.1 Atheneite (Pd,Hg)3As P 6/mmm 6/m 2/m 2/m

Strunz Class:

II/A.05-10 II - Sulfides and sulphosalts

II/A - Alloys and alloylike compounds, with metals of the Platinum series, (Palladium)

II/A.05 - Atheneite - Genkinite series

II/A.05-10 Atheneite (Pd,Hg)3As P 6/mmm 6/m 2/m 2/m

II/A.05-20 Vincentite (Pd,Pt)3(As,Sb,Te) Unk Mono

II/A.05-30 Stillwaterite Pd8As3 P 3 3

II/A.05-40 Arsenopalladinite Pd8(As,Sb)3 P1 1

II/A.05-50 Isomertieite Pd11Sb2As2 F d3m 4/m 3 2/m

II/A.05-60 Mertieite-I Pd11(Sb,As)4 Unk Hex

II/A.05-70 Mertieite-II Pd8(Sb,As)3 R 3c 3m

II/A.05-80 Stibiopalladinite Pd5Sb2 P 6₃mc 6mm

II/A.05-90 Palladoarsenide Pd2As P 2/m 2/m

II/A.05-100 Palladobismutharsenide Pd2(As,Bi) Pmcn,P 2₁cn Ortho

II/A.05-102 Palladodymite! (Pd,Rh)2As P nma 2/m 2/m 2/m

II/A.05-105 Rhodarsenide! (Rh,Pd)2As P nma or Pn2 Ortho

II/A.05-110 Majakite PdNiAs Unk Hex

II/A.05-112 Menshikovite! Pd3Ni2As3 P 6₃/m,P 6₃, or P 6₃22 Hex

II/A.05-115 Polkanovite! Rh12As7 P 6₃m 6/m

II/A.05-120 Genkinite (Pt,Pd)4Sb3 P 4₁2₁2 4 2 2

Other Atheneite Information

References:

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

See Also:

Links to other databases for Atheneite :
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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Print or Cut-and-Paste your Atheneite Specimen Label here :

Atheneite

(Pd,Hg)3As
Dana No: 2.2.4.1 Strunz No: II/A.05-10
Locality:

Notes: