The periodic table/Osmium
Introduction
[edit | edit source]Osmium is a dense, rare metal with a blue tint. It’s the densest metal in the periodic table, with a density of 22.6 gram per cubic centimeter.
Quick Facts
[edit | edit source]Melting point: 3033 degrees Celsius. Boiling point: 5012 degrees Celsius.
Discovery
[edit | edit source]Osmium is discovered by S. Tennant in 1803.
Etymology
[edit | edit source]Osmium is named after Greek όσμή, scent, for its volatile oxide osmium tetroxide.
Industrial production
[edit | edit source]The main source of osmium is copper (II) sulfide ore. After the removal of copper, silver, gold, palladium, platinum, rhodium and iridium, separate ruthenium and precipitate osmium (VI) coordination compound. Heat it in hydrogen flow and osmium can be obtained in its metallic form.
Compound
[edit | edit source]Halide
[edit | edit source]Fluoride
[edit | edit source]Osmium have a series of fluorides.
Osmium heptafluoride
[edit | edit source]Osmium heptafluoride is a yellow solid. It is obtained by the reaction of osmium and fluorine under high pressure and heat. It’s unstable.
Osmium hexafluoride
[edit | edit source]Osmium hexafluoride is a yellow solid obtained at a slightly lower pressure.