Nickel Compounds

Nickel is a very abundant, naturally occurring chemical element, which is usually found combined in various forms with iron, sulfur, or arsenic on the Earth’s surface and inside large meteorites. Earth’s molten core is composed of a nickel–iron alloy known as NiFe. Some natural ores containing nickel include garnierite, pentlandite, limonite, nickeline, kamacite, and taenite.

From a chemical point of view, nickel is a metal in the group VIIIB of the periodic table that exists in the oxidation states of +2, +3, and +4. It is a silvery-white, hard, but ductile metal used in combination with other metals (especially iron, copper, and zinc) to form alloys and plating used in industrial manufacturing for electrical and magnetic properties, high resistance to corrosion, and production of magnets, rechargeable ...