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Platinum Mineral Data
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General Platinum Information
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 Chemical Formula: |
Pt |
| Composition: |
Molecular Weight = 195.08 gm |
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Platinum 100.00 % Pt |
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______ |
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100.00 % |
| Empirical Formula: |
Pt |
| Environment: |
Mainly in grains and nuggets in alluvial deposits. |
| IMA Status: |
Valid Species (Pre-IMA) 1748 |
| Locality: |
Most notably from the Urals, Russia and Brazil. Link to MinDat.org Location Data. |
| Name Origin: |
Spanish, platina = "silver." |
| Name Pronunciation: |
Platinum  |
| Synonym: |
ICSD 64917 |
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PDF 4-802 |
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Platinum Image |
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Images:
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Cherepanovite Cooperite Platinum
Comments: Creamy-grayish fractured grains of cherepanovite with gray granular cooperite and white massive grains of iridian ruthenian platinum. Polished section in reflected light.
Location: Placer Deposit, Northern Pekul'nei River, Pekul'nei Range, Chukotka (Tchukotka) Okrug, Chukot Peninsula, Far-Eastern Region, Russia.
Scale: Picture size 0.12 mm.
© Thomas Witzke / Abraxas-Verlag |
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Images:
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Images:
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Platinum
Comments: Stream-worn, platinum nugget with chromite? Inclusions.
Location: Rio Tinto, San Juan River Basin, Papayan, Cauca, Columbia.
Scale: Picture size 1.5 cm.
© Paul M. Schumacher |
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Platinum Crystallography
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| Cell Dimensions: |
a = 3.9231, Z = 4; V = 60.38 Den(Calc)= 21.46 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.265(1), 1.962(0.53), 1.1826(0.33), |
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Physical Properties of Platinum
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| Cleavage: |
None |
| Color: |
Whitish steel gray, Steel gray, Dark gray. |
| Density: |
14 - 22, Average = 18 |
| Diaphaneity: |
Opaque |
| Fracture: |
Hackly - Jagged, torn surfaces, (e.g. fractured metals). |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Habit: |
Nuggets - Irregular lumps produced by stream transport of malleable metals. |
| Hardness: |
4-4.5 - Between Fluorite and Apatite |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Metallic |
| Magnetism: |
Naturally weak |
| Streak: |
grayish white |
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Optical Properties of Platinum
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| RL Color: |
White. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Platinum in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
57.00 |
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| 420 nm |
58.00 |
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| 440 nm |
59.00 |
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| 460 nm |
60.00 |
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| 480 nm |
61.00 |
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| 500 nm |
61.80 |
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| 520 nm |
62.70 |
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| 540 nm |
63.50 |
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| 560 nm |
64.20 |
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| 580 nm |
64.80 |
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| 600 nm |
65.60 |
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| 620 nm |
66.30 |
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| 640 nm |
66.80 |
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| 660 nm |
67.40 |
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| 680 nm |
68.00 |
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| 700 nm |
68.50 |
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Calculated Relative Intensity Colors of Platinum in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
150% |
| R |
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Calculated Properties of Platinum
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| Electron Density: |
Bulk Density (Electron Density)=17.2 gm/cc
note: Specific Gravity of Platinum =21.5 gm/cc.
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| Fermion Index: |
Fermion Index = 0.33
Boson Index = 0.67 |
| Photoelectric: |
PEPlatinum =1,619.87 barns/electron
U=PEPlatinum x rElectron Density=27798.55 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Platinum is Not Radioactive |
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Platinum Classification
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| Dana Class: |
01.02.01.01 (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 Platinum Information
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| References: |
NAME( Emsley91) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Platinum :
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 - Mineral and Gemstone Kingdom
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - University of Texas at Austin
16 - WWW-MINCRYST
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Platinum
Pt
Dana No: 01.02.01.01 Strunz No: 01.AF.10
Locality:
Notes:
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