Osmium Properties, Molecular Formula, Applications - WorldOfChemicals

Osmium Properties




Osmium is the densest natural element. It is found in nature as an alloy, mostly in platinum ores. Because of the volatility and extreme toxicity of its oxide, osmium is rarely used in its pure state, and is instead often alloyed with other metals. Those alloys are employed in fountain pen tips, electrical contacts and in other applications where extreme durability and hardness are needed.

Chemical Properties

Appearance Blue-Gray or Blue-Black Metal
Atomic Number 76
Atomic Weight 190.23 g/mol
Block d
Boiling Point 5012 °C
CAS Number 7440-04-2
Class 4.1
Density 22.59 g/cm3
EINECS Number 231-114-0
Electron Configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p6 4f145d66s2
Group 8
Ionization Energy 840 KJ/mol
Main Hazards Hexagonal
Melting Point 3033 °C
Oxidation State 8,7,6,5,4,3,2,1,0,-1,-2
PG 2
Period 6
RTECS Number RN1100000
Symbol Os
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