Superconductivity nitrides exhibiting

It is well known that the majority of refractory carbides and nitrides exhibit superconductivity. For NaCl-type compounds the critical temperature of transition to the superconducting state rises with the increase of transition element group number. This spurred a number of researchers to study the band structure of a series of nitrides (VN, NbN, TaN, CrN, MoN, WN,...) and to calculate the temperature with the objective of finding the compounds with the maximum - see Chapters 2 and 3. 

The majority of metal phosphides have a metal arsenide analogue which they usually resanble in properties and structure (Table 8.2). Metal phosphides, arsenides and nitrides not infrequently exhibit properties similar to those of metal carbides, silicides and germanides. Some metal phosphides are very useful semiconductors, while others shew superconduction or a variety of magnetic properties. Light-emitting diodes (LEDs) and nanostructured materials are other modem applications (Chapter 12.19). 

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