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Palladoarsenide

Pictures (1 Images total)

Pt–Fe alloy, laurite (1), törnroosite [Pd11As2Te2] (2), palladoarsenide [Pd2As] (3), sperrylite (4),
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Pt–Fe alloy, laurite (1), törnroosite [Pd11As2Te2] (2), palladoarsenide [Pd2As] (3), sperrylite (4),
Detrital composite grain consisting of Pt–Fe alloy, laurite (1), törnroosite ~[Pd11As2Te2] (2), palladoarsenide ~[Pd2As] (3), sperrylite (4), and irarsite (5). Moopetsi river, Maandagshoek farm, eastern Bushveld, RSA. Polished section, reflected light, in oil immersion.
Copyright: Thomas Oberthür; Contribution: Oberthür
Collection: in Anschliffsammlung BGR Hannover, Collection number: AS
Location: Südafrika/Limpopo, Provinz/Bushveld Complex/Maandagshoek Farm
Mineral: Irarsite, Laurite, Palladoarsenide, Platinum, Sperrylite, Törnroosite
Image: 1620849887
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Pt–Fe alloy, laurite (1), törnroosite [Pd11As2Te2] (2), palladoarsenide [Pd2As] (3), sperrylite (4), (SNr: AS)  W
Analysed with wavelength-dispersive X-ray WDS

Detrital composite grain consisting of Pt–Fe alloy, laurite (1), törnroosite [Pd11As2Te2] (2), palladoarsenide [Pd2As] (3), sperrylite (4), and irarsite (5). Moopetsi river, Maandagshoek farm, ea...

Collection: in Anschliffsammlung BGR Hannover
Copyright: Thomas Oberthür
Contribution: Oberthür 2021-05-12
Locality: Maandagshoek Farm / Bushveld Complex / Limpopo, Provinz / Südafrika

Collectors Summary

Color stahlgrau
Lustre Metallglanz
Hardness (Mohs) 4.75
Cleavages vollkommen in zwei Richtungen
Solubility +++ HNO3, - verdünnte HNO3, HCl, H2SO4
Crystal System monoklin, P2/m

Chemism

Chemical formula

Pd2As

Chemical composition

Arsen, Palladium

Unit weight: 287.763602 u; Number of atoms in the formula: 3

Info

Empirical formula:

Pd2As

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Arsenic

As

26.04

1

33.33

74.9216020

74.9216020

Palladium

Pd

73.96

2

66.67

106.4210000

212.8420000

Analysis wt%

Ø Pd : 67.55, Ag : 3.23, Au : 1.38, As : 25.95, PLT : 67.55 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 74)

Strunz 9th edition incl. updates

2.AC.25

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)
25:Palladoarsenid-Gruppe

Lapis Classification

II/A.05-090

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.320

2: SULFIDES
A: Alloys of Cu,Ag,Au,Ni,Pd with As,Sb,Bi,(Te)
C: With Pd
3: Stibiopalladinite-Palladoarsenide-Group

Dana 8th edition

02.04.14.01

02: Sulfide Minerals
04: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=2:1

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

stahlgrau

Change in color

grauweiß mit einem leicht rose Farbton in polierten BEreichen

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Anisotropism

Moderat, dunkelgrau mit Blauton zu rotbraun in Luft; dunkelgrau zu braungrau mit Rotstich in Öl

Reflectivity: (Lambda nm) ↓, ↑, Ø

(400) 44.20, 45.10, 44.65
(420) 46.80, 46.80, 46.80
(440) 48.40, 48.80, 48.60
(460) 49.40, 50.30, 49.85
(480) 50.20, 51.60, 50.90
(500) 51.20, 53.10, 52.15
(520) 51.90, 54.10, 53.00
(540) 52.50, 54.80, 53.65
(560) 53.30, 55.40, 54.35
(580) 53.90, 55.80, 54.85
(600) 54.60, 56.30, 55.45
(620) 55.40, 57.10, 56.25
(640) 56.00, 57.60, 56.80
(660) 56.60, 58.10, 57.35
(680) 57.10, 58.60, 57.85
(700) 57.80, 59.20, 58.50

Reflection chart Palladoarsenide

Reflectivity Ø

53.19

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

10

Space Group

P2/m

Cell parameters a (Å)

9.25

Cell parameters b (Å)

8.47

Cell parameters c (Å)

10.44

Cell parameters a/b or c/a

1.092

Cell parameters c/b

1.233

Cell parameters α

90°

Cell parameters β

94.0

Cell parameters γ

90°

Z

18

Volumne (ų)

815.955

X-Ray Powder Diffraction

2.60(70),
2.35(60),
2.31(60),
2.21(90),
2.14(100),
2.13(50),
2.12(50),
1.955(70)

XRD chart Palladoarsenide

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

Physical Properties

Hardness (Mohs)

4.75

VHN (Hardness Vickers)

277 - 357, Ø 326 (20g)

Density (g/cm³)

10.42

10.541 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen in zwei Richtungen

Tenacity

spröde

Instability

+++ HNO3, - verdünnte HNO3, HCl, H2SO4

(Co-)Type locality

(Co-)Type locality

Russland/Sibirien, Föderationskreis/Krasnojarsk, Region (Krasnojarski krai)/Taimyrhalbinsel (Tajmyr)/Putoran-Plateau/Noril'sk/Talnakh/Komsomol'skii Mine (Komsomolsky Mine)

Type material

A. E. Fersman Mineralogical Museum, Academy of Sciences, Moskau, Russland

Preface

Name from

Für Palladium und Arsen in seiner chemischen Zusammensetzung.

Author (Name, Year)

Begizov & Meshchankina & Dubakina, 1974

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 103 (1974), 104

New Data on Minerals 46 (2011), 48

Other languages

Spanish

Paladoarseniuro

German

Palladoarsenid

English

Palladoarsenide

French

Palladoarsenide

Russian

Палладоарсенид

Simplified Chinese

斜砷钯矿

CNMNC (IMA)-Number

IMA 1973-005

CNMNC symbol

Symbol

Pda

Locations with GPS information