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Atheneite (Atheneit)

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Atheneit
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Atheneit
Aggregat von Atheneit, Itabira, Minas Gerais, Brasilien; BB ~ 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Itabira
Mineral: Atheneite
Image: 1588314820
License: Usage for Mineralienatlas project only
Atheneit

Aggregat von Atheneit, Itabira, Minas Gerais, Brasilien; BB 1 mm, analysiert
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-05-01
Locality: Itabira / Minas Gerais / Südosten (Região Sudeste) / Brasilien

Collectors Summary

Color grau
Lustre Metallglanz
Hardness (Mohs) 5.25
Crystal System hexagonal, P62m

Chemism

Chemical formula

Pd2(As0.75Hg0.25)

Additional chem. information

vor 2010 - (Pd,Hg)3As (Z = 2)

Chemical composition

Arsen, Palladium, Quecksilber

Unit weight: 319.1812015 u; Number of atoms in the formula: 3

Info

Empirical formula:

Pd2(As0.75Hg0.25)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Arsenic

As

17.60

0.75

25.00

74.9216020

56.1912015
Palladium

Pd

66.68

2

66.67

106.4210000

212.8420000
Mercury

Hg

15.71

0.25

8.33

200.5920000

50.1480000

Analysis wt%

Pd : 66.00, Hg : 14.90, Au : 0.50, As : 19.00, PLT : 66.00 (Ref: Mineralogical Magazine 74)

Strunz 9th edition incl. updates

2.AC.05

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
A: Legierungen und legierungsartige Verbindungen
C: Verbindungen von Halbmetallen mit Platin-Gruppen-Elementen (PGE)
05:Atheneit-Vincentit-Gruppe

Lapis Classification

II/A.05-010

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
A: Legierungen und legierungsartige Verbindungen
5: mit Metallen der Platin-gruppe (v.a. Pd)

Classification by Hölzel

2.AC.150

2: SULFIDES
A: Alloys of Cu,Ag,Au,Ni,Pd with As,Sb,Bi,(Te)
C: With Pd
1: Atheneite-Vincentite-Group

Dana 8th edition

02.02.04.01

02: Sulfide Minerals
02: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=3:1

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

grau

Change in color

weiß in reflektiertem Licht

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Pleochroism

sehr schwach

Anisotropism

mäßig

Reflectivity: (Lambda nm) ↓, ↑, Ø

(400) 46.10, 48.30, 47.20
(420) 47.40, 49.80, 48.60
(440) 48.50, 50.90, 49.70
(460) 49.70, 52.40, 51.05
(480) 50.80, 53.60, 52.20
(500) 51.90, 54.80, 53.35
(520) 53.00, 55.80, 54.40
(540) 54.00, 56.70, 55.35
(560) 54.80, 57.30, 56.05
(580) 55.70, 57.80, 56.75
(600) 56.40, 58.30, 57.35
(620) 57.00, 58.50, 57.75
(640) 57.40, 58.60, 58.00
(660) 57.60, 58.70, 58.15
(680) 57.90, 59.00, 58.45
(700) 58.20, 59.10, 58.65
Reflection chart Atheneite

Reflectivity Ø

54.56

Crystallography

Crystal System

hexagonal

Class (H-M)

6m2

Space Group number

189

Space Group

P62m

Cell parameters a (Å)

6.813

Cell parameters b (Å)

-

Cell parameters c (Å)

3.4892

Cell parameters a/b or c/a

0.512

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

3

Volumne (ų)

140.26

Kristall structure

Luca Bindi: Atheneite, [Pd2][As0,75Hg0,25], from Itabira, Minas Gerais, Brazil: crystal structure and revision of the chemical formula. Can. Mineral. 48 (2010) S.1149-1155.

X-Ray Powder Diffraction

2.423(100),
2.246(80),
1.871(70),
1.371(80),
1.302(80),
1.259(80),
1.034(70),
0.879(70)
XRD chart Atheneite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.25

VHN (Hardness Vickers)

431 (100g)

Density (g/cm³)

10.2 (gemessen)

11.336 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Brasilien/Südosten (Região Sudeste)/Minas Gerais/Itabira

Preface

Author (Name, Year)

Clark & Criddle & Fejer, 1974

References

Mineralogical Magazine 39 (1974), 528

Luca Bindi: Atheneite, [Pd2][As0,75Hg0,25], from Itabira, Minas Gerais, Brazil: crystal structure and revision of the chemical formula. Can. Mineral. 48 (2010) S.1149-1155.

Other languages

Spanish

Ateneíta

German

Atheneit

French

Atheneite

English

Atheneite

Russian

Атенеит

Traditional Chinese

砷汞鈀礦

Simplified Chinese

砷汞钯矿

Alternative Name

Spanish

Atheneita

CNMNC (IMA)-Number

IMA 1973-050

CNMNC symbol

Symbol

Ah

Locations with GPS information