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Platinum is a silvery-white, lustrous metal that is malleable and ductile when pure. It has magnetic properties when combined with cobalt. Platinum metal occurs in nature contaminated with small amounts of all the platinum group metals; iridium, osmium, palladium, ruthenium, and rhodium. It does not corrode or tarnish in air and is not affected by water. In its finely divided form, platinum is an excellent catalyst. Similar to palladium, platinum absorbs large volumes of hydrogen.
|Property Name||Property Value||Property Name||Property Value|
|Atomic Code||(78Pt195.08)||First Ionization Energy||207K-cal/g-mole|
|Melting Point||1768.4°C||Vickers Hardness (annealed)||38-40|
|Boiling Point||3825°C||Linear Coefficient of Expansion||9.1x10-6K-1|
|Density||21.45g/cm3||Electrical Resistivity @ 20°C||9.85µΩ-cm|
|Specific Heat @ 0°C||0.0314cal/g°C||Crystal Structure||Cubic, face centered|
|Heat of Fusion||4.7k-cal/g-atom||Poisson Ratio||0.39|
|Heat of Vaporization||122k-cal/g-atom||Young's Modulus of Elasticity||24.8x106psi|
|Atomic Volume||9.10W/D||Tensile Strength (annealed)||20,000psi|