TlNbO2N

TlNbO₂N is an oxynitride ceramic compound combining thallium, niobium, oxygen, and nitrogen elements. This is a research-phase material studied primarily in photocatalysis and semiconductor applications, representing the broader family of transition metal oxynitrides that offer tunable bandgaps between pure oxides and nitrides. The material is notable for its potential in visible-light photocatalytic processes where conventional wide-bandgap oxides are ineffective, and for electronic applications requiring mixed anion chemistry, though it remains largely in laboratory development rather than commercial production.