NbNbON2

NbNbON₂ is an experimental niobium oxynitride ceramic compound combining metallic niobium with oxygen and nitrogen species in a mixed-valence structure. This material belongs to the transition metal oxynitride family, which has attracted research interest for potential applications requiring high hardness, chemical stability, and refractory properties at elevated temperatures. Niobium oxynitrides remain largely in the research phase, with potential relevance to hard coatings, wear-resistant surfaces, and high-temperature structural applications where conventional oxides or nitrides may be insufficient.