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Palladodymite (Palladodymit)

Collectors Summary

Color bräunlich grau mit bläulichen Farbton
Hardness (Mohs) 5.5
Cleavages keine
Crystal System orthorhombisch, Pnma

Chemism

Chemical formula

(Pd,Rh)2As

Chemical composition

Arsen, Palladium, Rhodium

Unit weight: 286.005853 u; Number of atoms in the formula: 3

Info

Empirical formula:

(Pd0.75Rh0.25)2As

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Arsenic

As

26.20

1

33.33

74.9216020

74.9216020

Rhodium

Rh

17.99

0.5

16.67

102.9055020

51.4527510

Palladium

Pd

55.81

1.5

50.00

106.4210000

159.6315000

Analysis wt%

Ø Ru : 2.40, Rh : 26.70, Pd : 33.50, Os : 1.00, Ir : 1.70, Pt : 4.40, Ni : 3.00, As : 26.50, PLT : 69.70 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 99)

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.05-102

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.355

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

02.04.19.02

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

bräunlich grau mit bläulichen Farbton

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pnma

Cell parameters a (Å)

5.91

Cell parameters b (Å)

3.90

Cell parameters c (Å)

7.34

Cell parameters a/b or c/a

1.515

Cell parameters c/b

1.882

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

169.18

X-Ray Powder Diffraction

2.43(100),
2.24(50),
2.06(10),
1.838(30),
1.710(10),
1.484(10),
1.380(10),
1.373(10)

XRD chart Palladodymite

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

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

566 (20g)

Density (g/cm³)

11.3 (berechnet)

11.228 ( ρ calc. Mineralienatlas )

Cleavages

keine

Tenacity

spröde

Preface

Author (Name, Year)

Britvin & Rudashevsky & Bogdanova & Shcherbachev, 1999

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 128 (1999) (2), 39

Other languages

Spanish

Paladodimita

German

Palladodymit

English

Palladodymite

French

Palladodymite

Russian

Палладодимит

Alternative Name

Spanish

Palladodymita

CNMNC (IMA)-Number

IMA 1997-028

CNMNC symbol

Symbol

Pdd

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 2dSYVA9BOEOE0Z6MaJouUw
GUID (Global unique identifier) 5498D4D9-410F-4338-84D1-9E8C689A2E53
Database ID 2895