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Chrisstanleyite (Chrisstanleyit)

Collectors Summary

Color silbergrau
Streak color schwarz
Lustre Metallglanz
Hardness (Mohs) 5
Cleavages keine
Fracture keiner
Crystal System monoklin, P21/c

Chemism

Chemical formula

Ag2Pd3Se4

Chemical composition

Palladium, Selen, Silber

Unit weight: 850.85144 u; Number of atoms in the formula: 9

Info

Empirical formula:

Ag2Pd3Se4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Selenium

Se

37.12

4

44.44

78.9630000

315.8520000
Palladium

Pd

37.52

3

33.33

106.4210000

319.2630000
Silver

Ag

25.36

2

22.22

107.8682200

215.7364400

Analysis wt%

Ø Ag : 25.09, Pd : 37.64, Se : 36.39, PLT : 37.64 (Ref: Mineralogical Magazine 98)

Strunz 9th edition incl. updates

2.BC.15

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
B: Metallsulfide, M : S > 1 : 1 (hauptsächlich 2 : 1)
C: mit Rhodium (Rh), Palladium (Pd), Platin (Pt), usw.
15:Chrisstanleyit-Gruppe

Lapis Classification

II/A.06-030

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

Classification by Hölzel

2.BC.270

2: SULFIDES
B: Sulfides (etc) with Me/S > 1/1 (mostly 2/1)
C: With Pd
2: Telargpalite-Sopcheite-Group (with Te)

Dana 8th edition

02.16.10.02

02: Sulfide Minerals
16: Sulfides - Including Selenides and Tellurides with miscellaneous formulae
10: Chrisstanleyite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

silbergrau

Streak color

schwarz

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Pleochroism

sehr schwach von hellgelbbraun nach graugrün-gelbbraun

Bireflectance

schwach bis moderat

Anisotropism

moderat

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

5.676

Cell parameters b (Å)

10.342

Cell parameters c (Å)

6.341

Cell parameters a/b or c/a

0.549

Cell parameters c/b

0.613

Cell parameters α

90°

Cell parameters β

115.0

Cell parameters γ

90°

Z

2

Volumne (ų)

337.35

X-Ray Powder Diffraction

2.868(50),
2.742(100),
2.688(80),
2.521(20),
2.367(50),
1.956(100),
1.918(20),
1.829(30)
XRD chart Chrisstanleyite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

395 (100g)

Density (g/cm³)

8.31

8.376 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

keiner

Tenacity

geringfügig spröde

(Co-)Type locality

(Co-)Type locality

UK/England/Devon Co./South Devon/Torquay/Hope's Nose

Type material

Institut für Mineralogie, Universität Salzburg
The Natural History Museum, London

Collection number of type material

II/A 1070 (Salzburg)
BM 1997,59 (London)

Preface

Occurrences

palladium- und silberhaltiges Gold, Fischesserit, Clausthalit, Eucairit, Tiemannit, Umangit

Name from

Der Name ehrt Dr. Chris J. Stanley (Nottingham 1954 - ) vom Natural History Museum in London.

Author (Name, Year)

Paar & Roberts & Criddle & Topa, 1998

References

Mineralogical Magazine 62 (1998), 257

Other languages

German

Chrisstanleyit

Spanish

Chrisstanleyita

French

Chrisstanleyite

English

Chrisstanleyite

Traditional Chinese

硒鈀銀礦

Simplified Chinese

硒钯银矿

CNMNC (IMA)-Number

IMA 1996-044

CNMNC symbol

Symbol

Csl

Locations with GPS information