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Iridium Mineral Data
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General Iridium Information
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 Chemical Formula: |
(Ir,Os,Ru,Pt) |
| Composition: |
Molecular Weight = 182.79 gm |
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Iridium 52.58 % Ir |
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Osmium 31.22 % Os |
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Ruthenium 5.53 % Ru |
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Platinum 10.67 % Pt |
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______ |
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100.00 % |
| Empirical Formula: |
Pt0.1Ir0.5Os0.3Ru0.1 |
| Environment: |
As exsolution particles in Pt-Fe alloys. |
| IMA Status: |
Valid Species (Pre-IMA) 1804 |
| Locality: |
Kamchatka Oblast', Pustaya River, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named after the element Iridium which was from the Latin, Iris = "rainbow" in allusion to the colored salts derived from its compounds. |
| Name Pronunciation: |
Iridium  |
| Synonym: |
ICSD 64992 |
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Irite - mixture of several PGE minerals |
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Osmiridium |
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PDF 6-598 |
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Platiniridium |
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Ruthenosmiridium |
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Iridium Image |
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Images:
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Iridium Crystallography
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| Cell Dimensions: |
a = 3.8394, Z = 4; V = 56.60 Den(Calc)= 21.45 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.217(1), 1.9197(0.5), 1.1574(0.45), |
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Physical Properties of Iridium
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| Cleavage: |
None |
| Color: |
White. |
| Density: |
22.6 - 22.8, Average = 22.7 |
| Diaphaneity: |
Opaque |
| Fracture: |
Malleable - Deforms rather than breaking apart with a hammer. |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Hardness: |
6-7 - Orthoclase-Quartz |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Metallic |
| Magnetism: |
Nonmagnetic |
| Streak: |
white |
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Optical Properties of Iridium
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| RL Color: |
White, silver with yellow tint. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Iridium in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
66.70 |
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| 420 nm |
67.60 |
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| 440 nm |
68.50 |
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| 460 nm |
69.20 |
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| 480 nm |
69.90 |
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| 500 nm |
70.40 |
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| 520 nm |
70.80 |
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| 540 nm |
71.20 |
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| 560 nm |
71.60 |
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| 580 nm |
72.00 |
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| 600 nm |
72.30 |
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| 620 nm |
72.70 |
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| 640 nm |
73.20 |
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| 660 nm |
73.70 |
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| 680 nm |
74.20 |
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| 700 nm |
74.80 |
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Calculated Relative Intensity Colors of Iridium in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
130% |
| R |
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Calculated Properties of Iridium
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| Electron Density: |
Bulk Density (Electron Density)=17.3 gm/cc
note: Specific Gravity of Iridium =21.5 gm/cc.
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| Fermion Index: |
Fermion Index = 0.1
Boson Index = 0.9 |
| Photoelectric: |
PEIridium =1,451.87 barns/electron
U=PEIridium x rElectron Density=25045.69 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Iridium is Not Radioactive |
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Iridium Classification
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| Dana Class: |
01.02.01.02 (01)Native Elements |
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(01.02)with platinum group metals and alloys |
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(01.02.01)Platinum group (Space Group Fm3m) |
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01.02.01.01 Platinum Pt F m3m 4/m 3 2/m |
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01.02.01.02 Iridium (Ir,Os,Ru,Pt) F m3m 4/m 3 2/m |
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01.02.01.03 Rhodium (Rh,Pt) F m3m 4/m 3 2/m |
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01.02.01.04 Palladium Pd,Pt F m3m 4/m 3 2/m |
| Strunz Class: |
01.AF.10 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.AF -Platinum-group elements |
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01.AF.10 Palladium Pd,Pt F m3m 4/m 3 2/m |
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01.AF.10 Iridium (Ir,Os,Ru,Pt) F m3m 4/m 3 2/m |
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01.AF.10 Rhodium (Rh,Pt) F m3m 4/m 3 2/m |
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01.AF.10 Platinum Pt F m3m 4/m 3 2/m |
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Other Iridium Information
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| References: |
NAME( Emsley91) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Iridium :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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|
Iridium
(Ir,Os,Ru,Pt)
Dana No: 01.02.01.02 Strunz No: 01.AF.10
Locality:
Notes:
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