Nickel(Ii) Oxide Cation And Anion

Nickel(II) oxide is a chemical compound composed of nickel cations (Ni2+) and oxide anions (O2-). The formula of this compound is NiO. In this compound, each nickel cation is surrounded by six oxide anions, forming an octahedral coordination geometry. The oxide anions are negatively charged and they balance the positive charge of the nickel cations. The compound has a black color and is insoluble in water. It is commonly used as a catalyst in various industrial processes and as a pigment in ceramics and glass manufacturing.