| All data is for information only------(Home) | |
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| PRODUCT DATA of Osmium |
| Material | Osmium |
| General Information | Osmium is the densest naturally occurring element |
| Use in Spacecraft | coating for mirrors |
| Precautions | Osmium oxide is toxic |
| Chemical Composition | 100Os |
| CAS Registry ID | 7440-04-2 |
| EXPERIENCE IN PRACTICE |
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| Equivalent Designations | Os |
| Space Experience | fair |
| PHYSICAL PROPERTIES |
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| Atomic Number | 76 |
| Atomic Weight | 190.23 amu |
| Crystal Structure | hexagonal close-packed (hcp) |
| Specific Gravity | 22.7 |
| ELASTIC PROPERTIES |
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| Tensile Modulus | 560 GPa |
| Shear Modulus | 222 GPa |
| Bulk Modulus | 462 GPa |
| Poisson Ratio | 0.25 |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 9.5e-8 ohm.m |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 86.9 W/m.K |
| Thermal Expansion Coefficient | 6.6 ustrain/°C |
| Specific Heat | 0.13 J/g.K |
| Melting Range | 3050 °C |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| Atmospheric Corrosion | Osmium oxide is toxic: special precautions shall be taken when work is done on this material. it sublimes at room temperature |
| Atomic Oxygen | Attacked by atomic oxygen |