Irradiation- vs. vitrification-induced disordering: The case of α -quartz and glassy silica

N. M.Anoop Krishnan, Bu Wang, Yann Le Pape, Gaurav Sant, Mathieu Bauchy

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37 Scopus citations

Abstract

Irradiation and vitrification can both result in the disordering of minerals. However, it remains unclear whether these effects are comparable or if the glassy state represents an upper limit for irradiation-induced disordering. By reactive molecular dynamics simulations, we compare the structure of irradiated quartz to that of glassy silica. We show that although they share some degree of similarity, the structure of irradiated quartz and glassy silica differs from each other, both at the short- (<3 Å) and the medium-range (>3 Å and <10 Å). In particular, the atomic network of irradiated quartz is found to comprise coordination defects, edge-sharing units, and large rings, which are absent from glassy silica. These results highlight the different nature of irradiation- and vitrification-induced disordering.

Original languageEnglish
Article number204502
JournalJournal of Chemical Physics
Volume146
Issue number20
DOIs
StatePublished - May 28 2017

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