PERIODIC TABLE
Osmium
Atomic No. 76
Os
Osmium
About Osmium
Osmium is a dense platinum group metal with atomic number 76 that forms compounds in several oxidation states. It is used in selected hard alloys and chemical catalysts. Osmium tetroxide is used in electron microscopy specimen preparation, but this volatile, highly toxic compound requires handling controls very different from those for bulk metal.
Properties
- Atomic Number
- 76
- Atomic Symbol
- Os
- Atomic Mass
- 190.23
- CAS No.
- 7440-04-2
- Density
- 22.59 g/cm³
- Series
- transition metal
- Melting Point
- 3,033°C
- Boiling Point
- 5,012°C
- Thermal Conductivity
- 0.87 W/cm °C
- Heat of Fusion
- 31 kJ/mol
- Heat of Vaporization
- 630 kJ/mol
- Electronegativity
- 2.2 pauling
- Crystal Structure
- Hexagonal
- Electrical Conductivity
- 1.2×107 S/m
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