In this study, transparent oxyfluoride glass-ceramics (GCs) with NaLaF4 nanocrystals (NCs) were prepared by the sol–gel method for first time. Three different molar ratios of La(CH3COO)3/Na(CH3COO) used to obtain GCs, which sintered at 450, 550 and 650 °C 1 min. X-ray diffraction (XRD) was employed follow evolution xerogel during heat treatments study crystal growth three temperatures. all case...