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Os - Osmium

Osmium

 Osmium 
Os
Atomic Number: 76
Atomic Weight: 190.23
Element Type: Transition Metal
Crystal Structure: Hexagonal
Melting Point: 3033.0°C = 5491.4°F = 3306.15 K
Boiling Point: 5012.0°C = 9053.6°F = 5285.15 K
Critical Temp: °C = °F = K
Atomic Radius: 1.92 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.26 Å
Electronegativity: 2.2

History

(Gr. osme, a smell) Discovered in 1803 by Tennant in the residue left when crudeplatinum is dissolved by aqua regia.


Sources

Osmium occurs in iridosule and in platinum-bearing river sands of the Urals, NorthAmerica, and South America. It is also found in the nickel-bearing ores of Sudbury,Ontario region along with other platinum metals. While the quantity of platinum metals inthese ores is very small, the large tonnages of nickel ores processed make commercialrecovery possible.







Science Quote

'For the sake of persons of ... different types, scientific truth should be presented in different forms, and should be regarded as equally scientific, whether it appears in the robust form and the vivid coloring of a physical illustration, or in the tenuity and paleness of a symbolic expression.'

James Clerk Maxwell
(1831-1879)





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