Mercury nitride describes chemical compounds that contain mercury cations and nitrido anions. Binary mercury nitrides, e.g. stoichiometrically compounds such as Hg3N2, are not well characterized and are probably unstable in the condensed phase under ordinary conditions. A nitride of mercury has been reported in the form of [Hg2N](NO3). This reddish solid adopts a network structure consisting of NHg4 tetrahedra linked by nitrateligands.