Low-temperature synthesis of K2NbO3F powders by an alternative approach of solid-state reaction

▶ In situ degradation of ammonium niobium oxalate and K2C2O4 promotes the reaction. ▶ Pure K2NbO3F was prepared at 550 °C which is the lowest temperature reported so far. ▶ Lower synthetic temperature leads to smaller particle size. ▶ The synthetic method is a facile, rapid, low price and environment friendly route.