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. A new approach has been made, in which the ionicity of bonding and a distance parameter have been introduced on the basis of intuitive arguments. An expression has been proposed on a heuristic basis, which seems to give fragilities in good agreement with the reported F _Relx ^1/2 fragilities.