Nickel Fluoride, with the chemical formula NiF2

Nickel Fluoride, with the chemical formula NiF2, is a green crystalline powder that is odorless and has a high melting point of approximately 1,372°C (2,502°F) and a boiling point of about 1,568°C (2,854°F). It is a tetragonal rutile structure compound with slightly tetragonally compressed NiF6 octahedra. This anhydrous fluoride is relatively unreactive towards concentrated acids and is only slightly soluble in anhydrous hydrogen fluoride. It is not attacked by electronegative elements such as chlorine, sulfur, and phosphorus.

Nickel Fluoride is sparingly soluble in water, and its solubility is affected by temperature and the presence of other substances. When dissolved, it dissociates into Ni+2 ions and F- ions in the aqueous solution. The compound is prepared by the action of anhydrous HF on anhydrous NiCl2 or nickel fluoride tetrahydrate at 300°C. It is also prepared by heating a mixture of NH4HF2 and NiF2.4H2O.

Industrially, Nickel Fluoride is used in various applications, including as a component in lithium-ion batteries, enhancing their performance and stability. It is also employed in electroplating processes to create durable and corrosion-resistant nickel coatings on various materials. Additionally, it acts as a catalyst in certain chemical reactions, aids in the synthesis of valuable products, and is incorporated in the production of specialty glass and ceramics, improving their properties and characteristics. Furthermore, Nickel Fluoride is utilized for water fluoridation to improve dental health by preventing tooth decay and serves as a precursor in the synthesis of other nickel compounds and chemical substances.

Safety is a critical aspect when handling Nickel Fluoride due to its toxic nature. It is classified with hazard codes Xi and T, indicating that it is an irritant and toxic. The compound can cause skin irritation, serious eye damage, and respiratory irritation. When heated to decomposition, it emits toxic fumes of hydrogen fluoride and nickel oxides. It is essential to handle this compound with appropriate personal protective equipment, including gloves, protective clothing, and eye protection, and to work in a well-ventilated area to prevent respiratory irritation. In case of contact with skin or eyes, immediate rinsing with water is necessary, followed by seeking medical attention.