Co - Cobalt


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


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


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.

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