Abstract
A chemical trend in glass formation with alkali atom (Li, Na, K) in tellurite glasses is recognized, whose physical origin is revealed by a recently formulated approach to the constraint theory of glasses [Phys. Rev. B 60, 11 859 (1999)]. In this work, the parameters appearing in the constraint theory are directly related to quantities derived from atomic structure studies, which facilitates the understanding of glass formation in ionic glasses. As a corollary, the issue of coordination number that has to be considered in the theory, and which has been debated in the literature, is clarified.
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