It is an interstitial compound, with nitrogen atoms occupying the octahedral holes in the chromium lattice:[2] as such, it is not strictly a chromium(III) compound nor does it contain nitride ions (N3−).
Chromium(III) nitride can be prepared by direct combination of chromium and nitrogen at 800 °C: It can also synthesize by Physical Vapour Deposition technique such as Cathodic arc deposition.
CrN is used as a coating material for corrosion resistance and in metal forming and plastic moulding applications.
CrN is also a valuable component in advanced multicomponent coating systems, such as CrAlN, for hard, wear-resistant applications on cutting tools.
[10][11][12] Though rare, carlsbergite - the natural form of chromium nitride - occurs in some meteorites.