Tags: Chemical Compound, Chemical Substance.
Nickel(II) oxide is the chemical compound with the formula NiO. It is notable as being the only well characterized oxide of nickel (although nickel(III) oxide Ni2O3 and NiO2 have been claimed). The mineralogical form of NiO bunsenite is very rare. It is classified as a basic metal oxide. Several million kilograms are produced in varying quality annually mainly as an intermediate in the production of nickel alloys.
