Mineralogy Database

Chengdeite Mineral Data

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General Chengdeite Information

Help on Chemical  Formula: Chemical Formula: Ir3Fe
Help on Composition: Composition: Molecular Weight = 632.51 gm
   Iron      8.83 %  Fe
   Iridium  91.17 %  Ir
           100.00 % 
Help on Empirical Formula: Empirical Formula: Ir3Fe0+
Help on Environment: Environment: In placer concentrations and chromate ores in ultrabasic rocks.
Help on IMA Status: IMA Status: Approved IMA 1995
Help on Locality: Locality: At the branch of the Luan river (about 200 km NNE of Beijing) in Chengde County, Peoples Republic of China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Synonym: Synonym: ICSD 56264
  PDF 49-1824

Chengdeite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 3.792, Z = 1; V = 54.53 Den(Calc)= 19.26
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: P m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.142(1), 1.094(0.8), 2.18(0.8),

Physical Properties of Chengdeite

Help on Cleavage: Cleavage: None
Help on Color: Color: Steel black.
Help on Density: Density: 19.3
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Hackly - Jagged, torn surfaces, (e.g. fractured metals).
Help on Habit: Habit: Nuggets - Irregular lumps produced by stream transport of malleable metals.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black

Calculated Properties of Chengdeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=15.7 gm/cc
note: Specific Gravity of Chengdeite =19.3 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0018718471
Boson Index = 0.9981281529
Help on Photoelectric: Photoelectric: PEChengdeite =1,393.05 barns/electron
U=PEChengdeite x rElectron Density=21803.16 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chengdeite is Not Radioactive

Chengdeite Classification

Help on  Dana Class: Dana Class: (01)Native Elements
  (01.02)with platinum group metals and alloys
  (01.02.05)Isoferroplatinum group (Space Group Pm3m) Isoferroplatinum (Pt,Pd)3(Fe,Cu) P m3m 4/m 3 2/m Rustenburgite (Pt,Pd)3Sn F m3m 4/m 3 2/m Atokite (Pd,Pt)3Sn F m3m 4/m 3 2/m Zvyagintsevite Pd3Pb P m3m 4/m 3 2/m Chengdeite Ir3Fe P m3m 4/m 3 2/m Yixunite! Pt3In P m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 01.AG.35 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
  01.A - Metals and Intermetallic Alloys
  01.AG -PGE-metal alloys
01.AG.35 Chengdeite Ir3Fe P m3m 4/m 3 2/m
01.AG.35 Isoferroplatinum (Pt,Pd)3(Fe,Cu) P m3m 4/m 3 2/m

Other Chengdeite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996)
Help on See Also: See Also: Links to other databases for Chengdeite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Dana No: Strunz No: 01.AG.35





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