Ternary system Li2O-K2O-Nb2O5

In the region investigated, three ternary invariant reactions were found. The first +⇄<β-Li3NbO4>+ is a quasi-peritectoid reaction occurring at 966 °C, the second is the eutectic reaction at 997 °C: Liq⇄<β-Li3NbO4>++ and the last one is the quasi-peritectic reaction: Liq+⇄+ at about 1050-1055 °C.