Probability distribution functions as descriptors for long range randomness in non-crystalline solids

摘要: Abstract Probability distribution functions (PDF) can be useful descriptors for the random structure of non-crystalline solids. The lognormal PDF has provided a good description interstitial site sizes in solids, both metallic and nonmetallic. utility this descriptor to characterize ring statistics vitreous silica under wide range pressures been evaluated. In fact, normal (Gaussian) is better up 23 GPa. Although average size largely unchanged (slightly less than 6.0) over entire pressure range, standard deviation rises sharply at 9 GPa serving as sensitive indicator onset plastic deformation.