Osmium has the highest melting point and the lowest vapor pressure of any of the platinum group of metals. Osmium tetroxide has recently been used to detect fingerprints and as an aid to stain fatty tissue for microscope slides. The metal is almost entirely used to produce very hard alloys with other metals of the platinum group.
Osmium is a Block D, Group 8, Period 6 element. The electronic configuration is [Xe] 4f14 5d6 6s2. In its elemental form osmium's CAS number is 7440-04-2. The osmium atom has a radius of 133.8.pm and it's Van der Waals radius is 200.pm.
Osmium was first discovered by Smithson Tennant in 1803.
French: osmium, German: Osmium, Italian: osmio, Portuguese: Osmio, Spanish: osmio, Swedish: Osmium
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