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Chengdeite (Chengdeit)

Pictures (1 Images total)

Chengdeit
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Chengdeit
Tulameen river, Princeton, British Columbia, Canada; 2.5mm nugget
Copyright: alfredo; Contribution: alfredo
Location: Kanada/British Columbia/Similkameen Mining Division/Tulameen-Fluss
Mineral: Chengdeite
Image: 1558818465
License: Usage for Mineralienatlas project only
Chengdeit  E
Analysed with energy dispersive X-ray spectroscopy EDX

Tulameen river, Princeton, British Columbia, Canada; 2.5mm nugget
Copyright: alfredo
Contribution: alfredo 2019-05-25
Locality: Tulameen-Fluss / Similkameen Mining Division / British Columbia / Kanada

Collectors Summary

Color schwarz
Streak color schwarz
Lustre Metallglanz
Hardness (Mohs) 5
Cleavages nicht beobachtet
Fracture nicht beobachtet
Crystal System kubisch, Pm3m

Chemism

Chemical formula

Ir3Fe

Chemical composition

Eisen, Iridium

Unit weight: 632.4971 u; Number of atoms in the formula: 4

Info

Empirical formula:

Ir3Fe

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Iron

Fe

8.83

1

25.00

55.8452000

55.8452000
Iridium

Ir

91.17

3

75.00

192.2173000

576.6519000

Analysis wt%

Fe : 7.90, Cu : 0.83, Ir : 88.50, Pt : 2.20, PLT : 91.00 (Ref: berechnet)

Strunz 9th edition incl. updates

1.AG.35

1: Elemente (Metalle, intermetallische Legierungen, Metalloide u. Nichtmetalle, Carbide, Silicide, Nitride u. Phosphide)
A: Metalle und intermetallische Legierungen
G: PGE(Platin-Gruppen-Elemente)-Metall-Legierungen
35:Isoferroplatin-Gruppe

Lapis Classification

I/A.15-005

I: ELEMENTE
A: Metalle und intermetallische Verbindungen
15: Platinmetalle und Platin-Eisen-Verbindungen, Verbindungen mit Zinn/Blei und Verwandte

Classification by Hölzel

1.AH.160

1: ELEMENTS
A: Metals, Intermetallic Compounds, and Alloys
H: PGE Alloys

Dana 8th edition

01.02.05.05

01: Native Elements and Alloys
02: Native Elements with platinum group metals and alloys
05: Isoferroplatinum group (Space Group Pm3m)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz

Streak color

schwarz

Lustre

Metallglanz

Reflectivity: (Lambda nm) ↓, ↑, Ø

(400) 61.70, , 61.70
(420) 63.20, , 63.20
(440) 64.50, , 64.50
(460) 65.70, , 65.70
(480) 66.50, , 66.50
(500) 67.40, , 67.40
(520) 68.30, , 68.30
(540) 69.10, , 69.10
(560) 69.90, , 69.90
(580) 70.70, , 70.70
(600) 71.60, , 71.60
(620) 72.40, , 72.40
(640) 72.50, , 72.50
(660) 72.50, , 72.50
(680) 72.70, , 72.70
(700) 72.80, , 72.80
Reflection chart Chengdeite

Reflectivity Ø

68.84

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

221

Space Group

Pm3m

Cell parameters a (Å)

3.792

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

1

Volumne (ų)

54.526

X-Ray Powder Diffraction

2.18(80),
1.89(60),
1.69(10),
1.34(70),
1.26(20),
1.200(10),
1.142(100),
1.094(80)
XRD chart Chengdeite

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)

452 (50g)

Density (g/cm³)

19.19 (berechnet)

19.261 ( ρ calc. Mineralienatlas )

Cleavages

nicht beobachtet

Fracture

nicht beobachtet

Tenacity

formbar

(Co-)Type locality

(Co-)Type locality

China/Hebei, Provinz/Chengde, bezirksfreie Stadt/Luan-Fluss (Luan He)/Gaotai

Preface

Author (Name, Year)

Yu Zuxiang, 1995

References

Yu Zuxiang (1995): Chengdeite - Ordered natural iron-iridium alloy - Acta Geologica Sinica (in chinesisch) 69 (1995), 215.

Mineralogical Record 27, 202.

American Mineralogist 81 (1996), 516.

Other languages

German

Chengdeit

French

Chengdeite

English

Chengdeite

Spanish

Chengdeíta

Russian

Чендеит

Simplified Chinese

承德矿

Japanese

ﾁｪﾝｸﾞﾃﾞｱｲﾄ

CNMNC (IMA)-Number

IMA 1994-023

CNMNC symbol

Symbol

Cgd