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Iridium, a precious metal, has an appearance similar to platinum in that it is white, but with a slightly yellowish tint. It is the most corrosion-resistant metal known, is very hard, brittle, and has a low ductility, making it difficult to machine, form, or work. Its principle use is as a hardening agent for platinum, though it is frequently found in crucibles and other high temperature devices.
|Property Name||Property Value||Property Name||Property Value|
|Atomic Code||(77Ir192.22)||First Ionization Energy||212K-cal/g-mole|
|Melting Point||2450°C||Vickers Hardness (annealed)||500|
|Boiling Point||4428°C||Linear Coefficient of Expansion||6.8x10-6K-1|
|Density||22.65g/cm3||Electrical Resistivity @ 20°C||5.11µΩ-cm|
|Themal Conductivity||0.14cal/cm2/cm/s/°C||Crystal Structure||Cubic, face centered|
|Specific Heat @ 0°C||0.031cal/g°C||Vapor Pressure @ M.P.||3.5mmHg|
|Heat of Fusion||6.6k-cal/g-atom||Young's Modulus of Elasticity||76x106psi|
|Heat of Vaporization||152k-cal/g-atom||Magnetic Susceptibility||6.6x10-6cgs|
|Atomic Volume||8.54W/D||Tensile Strength (annealed)||160,000psi|