Nickel oxide may refer to:
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Nickel(II) oxide
Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive but large pieces are slow to r ...
, NiO, green, well-characterised oxide
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Nickel(III) oxide
Nickel (III) oxide is the inorganic compound with the formula Ni2O3. It is not well characterized, and is sometimes referred to as black nickel oxide. Traces of Ni2O3 on nickel surfaces have been mentioned.
Nickel (III) oxide has been studied th ...
, Ni
2O
3, black, not well-characterised oxide
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Oxonickelates
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