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   27    

27 Co Cobalt

Transition metal, mass: 58.933 u, 1 stable isotope (59), abundance rank (earth/space): 29/23

Click image to magnify. Fractions from a cobalt cathode, 7 and 4 grams. Original size in cm: 2 x 2 each
Cobalt Cobalt piece
Cobalt is a ferromagnetic, ductile metal, which is very similar to iron, but is much rarer than this. It is used for magnets and for many different alloys. Cobalt blue, CoAl2O4, is one of the most important blue colorants for glas and ceramics. Also cobalt is part of the vitamin B12 and therefore is needed in small amounts in our food.

Cobalt cathode Cobalt cathode piece
Two 3 grams pieces.

Cobalt glass
Flask made of cobalt glass. Glass is stained with cobalt blue for decoration and to protect light sensitive liquids.


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