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Chengdeite Mineral Data
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General Chengdeite Information
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 Chemical Formula: |
Ir3Fe |
| Composition: |
Molecular Weight = 632.51 gm |
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Iron 8.83 % Fe |
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Iridium 91.17 % Ir |
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______ |
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100.00 % |
| Empirical Formula: |
Ir3Fe0+ |
| Environment: |
In placer concentrations and chromate ores in ultrabasic rocks. |
| IMA Status: |
Approved IMA 1995 |
| 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. |
| Name Origin: |
Named after its locality. |
| Synonym: |
ICSD 56264 |
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IMA1994-023 |
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PDF 49-1824 |
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Chengdeite Crystallography
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| Cell Dimensions: |
a = 3.792, Z = 1; V = 54.53 Den(Calc)= 19.26 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: P m3m |
| X Ray Diffraction: |
By Intensity(I/Io): 1.142(1), 1.094(0.8), 2.18(0.8), |
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Physical Properties of Chengdeite
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| Cleavage: |
None |
| Color: |
Steel black. |
| Density: |
19.3 |
| Diaphaneity: |
Opaque |
| Fracture: |
Hackly - Jagged, torn surfaces, (e.g. fractured metals). |
| Habit: |
Nuggets - Irregular lumps produced by stream transport of malleable metals. |
| Hardness: |
5 - Apatite |
| Luster: |
Metallic |
| Streak: |
black |
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Calculated Properties of Chengdeite
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| Electron Density: |
Bulk Density (Electron Density)=15.7 gm/cc
note: Specific Gravity of Chengdeite =19.3 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0018718471
Boson Index = 0.9981281529 |
| Photoelectric: |
PEChengdeite =1,393.05 barns/electron
U=PEChengdeite x rElectron Density=21803.16 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chengdeite is Not Radioactive |
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Chengdeite Classification
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| Dana Class: |
01.02.05.05 (01)Native Elements |
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(01.02)with platinum group metals and alloys |
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(01.02.05)Isoferroplatinum group (Space Group Pm3m) |
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01.02.05.01 Isoferroplatinum (Pt,Pd)3(Fe,Cu) P m3m 4/m 3 2/m |
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01.02.05.02 Rustenburgite (Pt,Pd)3Sn F m3m 4/m 3 2/m |
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01.02.05.03 Atokite (Pd,Pt)3Sn F m3m 4/m 3 2/m |
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01.02.05.04 Zvyagintsevite Pd3Pb P m3m 4/m 3 2/m |
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01.02.05.05 Chengdeite Ir3Fe P m3m 4/m 3 2/m |
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01.02.05.06 Yixunite! Pt3In P m3m 4/m 3 2/m |
| Strunz Class: |
01.AG.35 01 - ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides) |
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01.A - Metals and Intermetallic Alloys |
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01.AG -PGE-metal alloys |
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01.AG.35 Chengdeite Ir3Fe P m3m 4/m 3 2/m |
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01.AG.35 Isoferroplatinum (Pt,Pd)3(Fe,Cu) P m3m 4/m 3 2/m |
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Other Chengdeite Information
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| References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) |
| 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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Print or Cut-and-Paste your Chengdeite Specimen Label here :
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Chengdeite
Ir3Fe
Dana No: 01.02.05.05 Strunz No: 01.AG.35
Locality:
Notes:
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