Gallium nitride ($\mathrm{GaN}$)

Gallium nitride is $\mathrm{GaN}$, a wide-band-gap semiconductor. Its bonded crystal lattice supports electronic and optical behavior unlike that of either elemental gallium or molecular nitrogen.

It is important in light-emitting devices and power electronics. Crystal quality, defects, and doping influence performance, so elemental composition alone does not determine a device's properties.