Lithium nitride

Lithium Nitride

Crystal structure of lithium nitride (Li_N)

Lithium nitride is an inorganic compound with the chemical formula Li_N. It is the only stable alkali metal nitride and is a red or purple solid. Lithium nitride is notable for its high ionic conductivity and is used in various applications, including as a precursor to other lithium compounds and in battery technology.

Structure

Lithium nitride crystallizes in a hexagonal structure, which is depicted in the adjacent image. The structure consists of layers of lithium ions and nitrogen ions. Each nitrogen ion is surrounded by six lithium ions, forming a trigonal bipyramidal arrangement. This unique structure contributes to its high ionic conductivity.

Properties

Lithium nitride is a highly reactive compound. It reacts with water to produce ammonia and lithium hydroxide:

Li_N + 3 H_O _ 3 LiOH + NH_

It is also reactive with carbon dioxide and can be used to absorb this gas. The compound is stable in dry air but decomposes in moist air.

Applications

Lithium nitride is used in the synthesis of other lithium compounds. It serves as a precursor in the production of lithium amide and lithium hydride. Due to its high ionic conductivity, it is also of interest in the development of solid-state batteries.

Related pages

• Lithium
• Nitrogen
• Ionic conductivity
• Solid-state battery