The diffractograms in Figure 4 show that the majority phase of well-crystallised sodium aluminate NaAlO2 PDF33-1200 was presented at 1,000°C. Sodium aluminate phase was still present as main crystalline when treating the sample at 1,200°C where representative peaks were more defined.
Al tratar la muestra a 1.200 °C se mantiene el aluminato de sodio NaAlO2 como principal fase cristalina, donde los picos representativos están más definidos.