Date of Discovery: 1803
Discoverer: Smithson Tenant
Name Origin: From the Greek word osmл (odor)
Uses: tip gold pen points, instrument pivots, electrical light filaments
Obtained From: ores that contain platinum

 
Atomic Number: 76
Atomic Mass: 190.23 amu
Melting Point: 3045.0 °C (3318.15 K, 5513.0 °F)
Boiling Point: 5027.0 °C (5300.15 K, 9080.6 °F)
Crystal Structure: Hexagonal
Density @ 293 K: 22.4 g/cm3
Color: silvery

 
Isotope Os-184 Os-185 Os-186 Os-187 Os-188 Os-189 Os-190 Os-190m Os-191 Os-191m Os-192 Os-193 Os-194
Half Life Stable 93.6 days 2.0E15 years Stable Stable Stable Stable 9.9 min 15.4 days 13.1 hours Stable 30.5 hours 6.0 years