Cobalt is silver gray metal, and has similiar characteristcs of nickel and iron.Its hardness is as much as pure iron. Pull resistance of cobalt is 25 kg/mm2.
CHEMICAL AND PHYSICAL PROPERTIES
Atomic numbr: 27
Atomic mass number: 58.933
Boiling Point : 2900 ºC
Melting Point : 1495 ºC
Density: 8.9 gr/cm³
Cobalt is an element of which minerals are seldom found in nature. Its best known minerals are simalt ( (Co,Ni) As2) and Cobaltite(CoAsS. It is also found in small portions nickel and copper ore. As it is difficult to seperate from other elements, coit requires lots of process to obtaqin pure cobalt.