The periodic table/Osmium
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.
Melting point: 3033 degrees Celsius. Boiling point: 5012 degrees Celsius.
Osmium is discovered by S. Tennant in 1803.
Osmium is named after Greek όσμή, scent, for its volatile oxide osmium tetroxide.
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.
Osmium have a series of fluorides.
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 is a yellow solid obtained at a slightly lower pressure.