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One of the platinum group metals, osmium is bluish-white, lustrous, extremely hard and brittle. Its properties make it ideal for combining with other platinum metals to produce very hard alloys. Osmium has the highest melting point and lowest vapor pressure of the platinum group and it is very difficult to fabricate. While osmium powder or sponge is affected by air at room temperature, the metal is relatively inert in ambient conditions.
|Property Name||Property Value||Property Name||Property Value|
|Atomic Code||(76Os190.23)||First Ionization Energy||201K-cal/g-mole|
|Melting Point||3045°C||Vickers Hardness (annealed)||400|
|Boiling Point||5027°C||Linear Coefficient of Expansion||6.1x10-6K-1|
|Themal Conductivity||0.205cal/cm2/cm/s/°C||Crystal Structure||Hexagonal|
|Themal Conductivity @ 0°C||0.031cal/g||Thermal Neutron Cross Section||15.3Gauss|
|Heat of Fusion||6.4k-cal/g-atom||Young's Modulus of Elasticity||81x106psi|
|Heat of Vaporization||162k-cal/g-atom||Magnetic Susceptibility||0.074x10-6cgs|
|Atomic Volume||8.43W/D||Ionization Potential||8.7volts|