Growth of devitrite, Na <inf>2</inf> Ca <inf>3</inf> Si <inf>6</inf> O <inf>16</inf>, in soda-lime-silica glass

Abstract

The morphology and crystal growth of devitrite crystals nucleated heterogeneously on glass surfaces have been studied. The crystals grow as fans of needles, with each needle having a characteristic [100] growth direction with respect to the centrosymmetric triclinic unit cell. An analysis of crystal growth data reported here and a reappraisal of crystal growth data reported in prior studies suggests a best estimate of 260 kJ/mol for the activation enthalpy for the crystal growth of devitrite along [100], higher than the values previously reported.We would like to thank the Nuffield Foundation, London, U.K. for the award of an Undergraduate Bursary to RPT during the course of this workThis article (Knowles, K. M., Thompson, R. P. (2014), Growth of Devitrite, Na2Ca3Si6O16, in Soda–Lime–Silica Glass. Journal of the American Ceramic Society, 97: 1425–1433. doi: 10.1111/jace.12922) is the author accepted manuscript, which can also be found on the publisher's website at: http://onlinelibrary.wiley.com/doi/10.1111/jace.12922/abstract © 2014 The American Ceramic Societ