Metals
- Elements List
- Aluminium, Al
- Antimony, Sb
- Arsenic, As
- Barium, Ba
- Beryllium, Be
- Bismuth, Bi
- Boron, B
- Cadmium, Cd
- Calcium, Ca
- Carbon, C (Graphite)
- Cerium, Ce
- Cesium, Cs
- Chromium, Cr
- Cobalt, Co
- Copper, Cu
- Dysprosium, Dy
- Erbium, Er
- Europium, Eu
- Gadolinium, Gd
- Gallium, Ga
- Germanium, Ge
- Gold, Au
- Hafnium, Hf
- Holmium, Ho
- Indium, In
- Iridium, Ir
- Iron, Fe
- Lanthanum, La
- Lead, Pb
- Lithium, Li
- Lutetium, Lu
- Magnesium, Mg
- Manganese, Mn
- Mercury, Hg
- Molybdenum, Mo
- Neodymium, Nd
- Nickel, Ni
- Niobium, Nb
- Osmium, Os
- Palladium, Pd
- Phosphorus, P
- Platinum, Pt
- Potassium, K
- Praseodymium, Pr
- Rhenium, Re
- Rhodium, Rh
- Rubidium, Rb
- Ruthenium, Ru
- Samarium, Sm
- Scandium, Sc
- Selenium, Se
- Silicon, Si
- Silver, Ag
- Sodium, Na
- Strontium, Sr
- Sulphur, S
- Tantalum, Ta
- Tellurium, Te
- Terbium, Tb
- Thallium, Tl
- Thorium, Th
- Thulium, Tm
- Tin, Sn
- Titanium, Ti
- Tungsten, W
- Vanadium, V
- Ytterbium, Yb
- Yttrium, Y
- Zinc, Zn
- Zirconium, Zr
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Platinum, Pt
Description
Platinum is a chemical element with the atomic symbol Pt and an atomic number of 78. It is in group 10 of the Periodic Table of Elements. A heavy, malleable, ductile, precious, gray-white transition metal, platinum is resistant to corrosion and occurs in some nickel and copper ores along with some native deposits. Platinum is used in jewelry, laboratory equipment, electrical contacts, dentistry, and automobile emissions control devices. Platinum bullion has the ISO currency code of XPT.
Available Forms:
| Technical Data | ||||||||
| Symbol | Pt | Density (20°C)gcm-3 | 21.41 | |||||
| Atomic number | 78 | Melting point /°C | 1769 | |||||
| No. of naturally occurring isotopes | 6* | Boiling point /°C | 4170 | |||||
| Atomic weight | 195.08(+/-0.03) | ΔHfus/kJmol-1 | 19.7(+/-2.1) | |||||
| Electronic configuration | [Xe]4fJ45d'6s' | ΔHvap/kJmol-1 | 469(+/-25) | |||||
| Metal radius(12-coordinate)/pm | 138.5 | ΔHf(monoatomic gas)/kJmol-1 | 545(+/-21) | |||||
| Effective ionic radius(6-coord)/pm V | 57 | Electrical resistivity | ||||||
| Effective ionic radius(6-coord)/pm IV | 62.5 | (20°C)/μohm cm | 9.85 | |||||
| Effective ionic radius(6-coord)/pm III | - | Electronegativity χ | 2.2 | |||||
| Effective ionic radius(6-coord)/pm II | 80 | *all have zero nuclear spin except 195Pt (33.8% abundance) which has a nuclear spin quantum no. ½ | ||||||
| Evaporation Techniques | ||||||||
| Temperature (oC) @Vap. Pressure | Techniques | Remarks | ||||||
| 10-8 Torr | 10-6 Torr | 10-4 Torr | Electron Beam | Crucible | Coil | Boat | ||
| 1292 | 1492 | 1747 | Excellent | Graphite, ThO2 | Tungsten | Tungsten | Alloys with metals. Films soft poor adhesion. Go to Evaporation Sources Page | |
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