Cobalt (Co)

Cobalt (Co)

Atomic Number: 27
Atomic Weight: 58.93
Melting Point: 1495
Boiling Point: 2870
Specific Gravity: 8.9
Valence(s): 2 or 3

Cobalt was discovered by Brandt in 1735. Cobalt, in its salt forms, has been used for centuries to produce brilliant and permanent blue colours in porcelain, glass, pottery, tiles and enamels. Cobalt alloys are used for high-speed, heavy-duty, high-temperature cutting tools. Cobalt occurs in the minerals cobalite, smaltite and erythrite. [LM] {RW}