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Chengdeite

Big Photo

Tolovka River placer, Ust'-Bel'skii ultrabasic Massif, Koryak (Koriak; Koriakskhiye) Upland, Koriak Autonomous Okrug, Far-Eastern Region, Russia
© 2008, J. Weissman

Formula:
Ir
 
3
Fe
System:IsometricColour:Steel-black
Lustre:MetallicHardness:5
Name:After the type locality at Gaotai village, in the Luan River (Luan He) valley, CHENGDE Prefecture, Hebei Province, China.


Found in chromite ores in ultrabasic rocks and associated placer deposits.

Classification of Chengdeite

IMA status:Approved
Strunz 8th edition ID:1/A.15-05
Nickel-Strunz 10th (pending) edition ID:1.AG.35

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
G : PGE-metal alloys
Dana 7th edition ID:1.2.6.2
Dana 8th edition ID:1.2.5.5

1 : NATIVE ELEMENTS AND ALLOYS
2 : Platinum Group Metals and Alloys
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Type Occurrence of Chengdeite

Type Locality:Gaotai village, Luan River (Luan He) valley, Chengde Prefecture, Hebei Province, China

Physical Properties of Chengdeite

Lustre:Metallic
Colour:Steel-black
Hardness (Mohs):5

Crystallography of Chengdeite

Crystal System:Isometric

Optical Data of Chengdeite

Type:Isotropic

Chemical Properties of Chengdeite

Formula:
Ir
 
3
Fe
Essential elements:Fe, Ir
All elements listed in formula:Fe, Ir

Relationship of Chengdeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
1.AG.05Hexaferrum
(Fe,Os,Ru,Ir)
1.AG.10Atokite
(Pd,Pt)
 
3
Sn
1.AG.10Rustenburgite
(Pt,Pd)
 
3
Sn
1.AG.10Zvyagintsevite
(Pd,Pt,Au)
 
3
(Pb,Sn)
1.AG.15Taimyrite
(Pd,Cu,Pt)
 
3
Sn
1.AG.15Tatyanaite
(Pt,Pd,Cu)
 
9
Cu
 
3
Sn
 
4
1.AG.20Paolovite
Pd
 
2
Sn
1.AG.25Plumbopalladinite
Pb
 
2
Pd
 
3
1.AG.25Stannopalladinite
(Pd,Cu)
 
3
Sn
 
2
1.AG.30Cabriite
Pd
 
2
SnCu
1.AG.35Isoferroplatinum
Pt
 
3
Fe
1.AG.40Ferronickelplatinum
Pt
 
2
FeNi
1.AG.40Tetraferroplatinum
PtFe
1.AG.40Tulameenite
Pt
 
2
CuFe
1.AG.45Hongshiite
PtCu
1.AG.45Skaergaardite
PdCu
1.AG.50Yixunite
Pt
 
3
In
1.AG.55Damiaoite
PtIn
 
2
1.AG.60Niggliite
PtSn
1.AG.65Bortnikovite
Pd
 
4
Cu
 
3
Zn
1.AG.70Nielsenite
PdCu
 
3
Related Minerals - Dana Grouping):

- +
1.2.6.1Isoferroplatinum
Pt
 
3
Fe
1.2.6.3Yixunite
Pt
 
3
In

Other Names for Chengdeite

Synonyms:
IMA1994-023
Other Languages:
German:Chengdeit
Russian:Чендеит
Spanish:Chengdeita

Other Information

Other Information:Strong Magnetism
Malleable
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Chengdeite

Reference List:Yu Zuxiang (1995): Chengdeite - Ordered natural iron-iridium alloy. Acta Geologica Sinica 69(3), 215-20 (in Chinese, English abstract). - New Minerals 1995-1999, 42 (abstract).

Mineralogical Record 27, 202.

Articles/Blogs about Chengdeite

Internet Links for Chengdeite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Chengdeite in the Natural History Museum (London) online catalogue
  • Chengdeite details from Handbook of Mineralogy (PDF)
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    Localities for Chengdeite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    China
     
    • Hebei Province
      • Chengde Prefecture
        • Luan River (Luan He) valley
    		Yu Zuxiang (1995): Acta Geologica Sinica 69(3), 215-220.
    Mineral and/or Locality
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