The crystallization kinetics of 20)(BaF2)(15)(SrF2)(20)(GdF3)(2)(LaF3)
(1)(DyF3)(2) glass was studied by differential scanning calorimetry. I
t was found that the two-parameter Sestak-Berggren equation gives a mo
re quantitative description of the crystallization process than the Jo
hnson-Mehl-Avrami model. The thermal stability criteria allowing compa
rison of different glass forming systems are discussed.