Niobium mononitride

Niobium Mononitride, NbN, is obtained by heating a mixture of niobium pentoxide and lampblack in an atmosphere of nitrogen at... 

Nitrides, Phosphides, Arsenides, and Related Compounds. The presence of imperfections in the metal sub-lattice of cubic tantalum nitride indicated by neutron diffraction experiments has been confirmed by density measurements the results are consistent with the stoicheiometry Tao.saN. The phase diagram of the Ta-N system has been investigated. The dissociation pressure of non-stoicheiometric niobium mononitride has been measured,and the structures of Nb32N3, Ni2Ta4N, " TagN, and TaagNj have been determined. 

HM>8) Dark gray crystals. Transition temperature 15.2 K. Insoluble in HQ, HNO3, and H2SO4, but attacked by hot caustic solutions, lime, or strong alkalis, evolving NH3. Niobium mononitride... 

Niobium nitride (also known as columbium nitride) has three phases Nb2N, Nb4N3, and NbN. The mononitride, NbN, is the most common phase and the only one reviewed here. NbN is an excellent superconductor. It is produced by CVD mostly on an experimental basis. Its characteristics and properties are summarized in Table 10.5. 

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