MÖSSBAUER STUDY OF ZrF4–BaF2–FeF3 GLASSES
The Mossbauer spectra of ZrF4–BaF2–FeF3 glasses revealed that both Fe2+ and Fe3+ with octahedral F coordination are present in the glasses. The compositional dependence of Fe2+/(Fe2+ + Fe3+), explainable with the basicity of glass, suggests that Fe2+ and Fe3+ behave like a glass modifier and a glass former, respectively.