Fragility thy name is glass.

Abstract

Fragility is a novel concept to understand the behaviour of glass-forming liquids. Several approaches have been made to quantify fragility. In this paper, some important formulae have been briefly introduced. Anew approach has been made, in which the ionicity of bonding and a distance parameter have been introduced on the basis of intuitive argu- ments. An expression has been proposed on a heuristic basis, which seems to give fragilities in good agreement with the reported F;:'lx fragilities.