Facts
- Symbol
- Os
- Atomic number
- 76
- Atomic mass
- 190.2 u
- Minerals
- 8
- Period
- 6
- Group
- 8
- Block
- d
- Melting point
- 3,400 °C
- Boiling point
- 5,273 °C
- Discovered
- 1804
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q751
Minerals containing this element · 8
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Erlichmanite | OsS₂ | Cubic | — | 9.42 g/cm³ |
| Hexaferrum | (Fe,Os,Ru,Ir) | Hexagonal | — | — |
| Hexamolybdenum | (Mo,Ru,Fe,Ir,Os) | Hexagonal | — | — |
| Omeiite | (Os,Ru)As₂ | Orthorhombic | 7.0 | — |
| Osarsite | OsAsS | Monoclinic | — | — |
| Osmium (native) | Os | Hexagonal | — | — |
| Ruarsite | (Ru,Os)AsS | Monoclinic | — | — |
| Rutheniridosmine | (Ir,Os,Ru) | Hexagonal | — | 20.49 g/cm³ |