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Osmium (76Os190.23)
[7440-04-2]
[7440-04-2]
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Elemental Form| 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. | ||||
| Melting Point | 3045°C | Boiling Point | 5027°C | |
| Density | 22.61g/cm3 | Themal Conductivity | 0.205cal/cm2/cm/s/°C | |
| Themal Conductivity @ 0°C | 0.031cal/g | Heat of Fusion | 6.4k-cal/g-atom | |
| Heat of Vaporization | 162k-cal/g-atom | Atomic Volume | 8.43W/D | |
| First Ionization Energy | 201K-cal/g-mole | Electronegativity | 2.2Pauling's | |
| Covalent Radius | 1.26Angstroms | Vickers Hardness (annealed) | 400 | |
| Linear Coefficient of Expansion | 6.1x10-6K-1 | Electrical Resistivity | 8.12µΩ-cm | |
| Crystal Structure | Hexagonal | Thermal Neutron Cross Section | 15.3Gauss | |
| Young's Modulus of Elasticity | 81x106psi | Magnetic Susceptibility | 0.074x10-6cgs | |
| Ionization Potential | 8.7volts | |||
