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Co - Cobalt

Cobalt

 Cobalt 
Co
Atomic Number: 27
Atomic Weight: 58.9332
Element Type: Transition Metal
Crystal Structure: Hexagonal
Melting Point: 1495.0°C = 2723.0°F = 1768.15 K
Boiling Point: 2927.0°C = 5300.6°F = 3200.15 K
Critical Temp: °C = °F = K
Atomic Radius: 1.67 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.16 Å
Electronegativity: 1.88

History

(Kobald, from the German, goblin or evil spirit, cobalos, Greek, mine) Brandtdiscovered cobalt in about 1735.


Sources

Cobalt occurs in the minerals cobaltite, smaltite, and erythrite, and is oftenassociated with nickel , silver , lead, copper , and iron ores, from which it is most frequently obtainedas a by-product. It is also present in meteorites.

Important ore deposits are found in Zaire, Morocco, and Canada. The U.S. GeologicalSurvey has announced that the bottom of the north central Pacific Ocean may havecobalt-rich deposits at relatively shallow depths in water close to the the HawaiianIslands and other U.S. Pacific territories.



Science Quote

'You cannot hope to build a better world without improving the individuals. To that end each of us must work for his own improvement, and at the same time share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful.'

Marie Curie
(1867-1934)


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