Table 1: Composition (mol%), fluorine content (Wt%), and characteristic temperatures ( , , and crystallization temperatures of CaF2 and Ca2Al3O6F in °C) of the precursor glass samples.

Sample codeSiO2Al2O3CaF2ErF3YbF3Fluorine content CaF2Ca2Al3O6F

SA1.8452535 583/969720867
SA2.18482235 570/984705861
SA1.8EY4525350.52 500, 605/1009 675871
SA2.18EY4822350.52 461/1018660865