NMR properties:

Magnetogyric Ratio NMR frequency Natural abundance (NA) Nuclear spin (I) Quadrupole moment (Q) Reference sample
59 Co 6.33210^7 rad/sT 23.7271MHz 100% 7.5 42fm²

D2O

59 Co
27

History
(Kobald, from the German, goblin or evil spirit, cobalos, Greek, mine) Brandt discovered cobalt in about
1735.
Sources
Cobalt occurs in the minerals cobaltite, smaltite, and erythrite, and is often associated with nickel , silver
, lead , copper , and iron ores, from which it is most frequently obtained as a by-product. It is also present
in meteorites.
Important ore deposits are found in Zaire, Morocco, and Canada. The U.S. Geological Survey has
announced that the bottom of the north central Pacific Ocean may have cobalt-rich deposits at relatively
shallow depths in water close to the the Hawaiian Islands and other U.S. Pacific territories.
Properties
Cobalt is a brittle, hard metal, resembling iron and nickel in appearance. It has a metallic permeability of
about two thirds that of iron. Cobalt tends to exist as a mixture of two allotropes over a wide temperature
range. The transformation is sluggish and accounts in part for the wide variation in reported data on
physical properties of cobalt.