Structure and Liquid Fragility in Sodium Carbonate.

Author(s) Wilson, M.; Ribeiro, M.C.C.; Wilding, M.C.; Benmore, C.; Weber, J.K.R.; Alderman, O.; Tamalonis, A.; Parise, J.B.
Journal J Phys Chem A
Date Published 2018 Jan 18
Abstract

The relationship between local structure and dynamics is explored for molten sodium carbonate. A flexible fluctuating-charge model, which allows for changes in the shape and charge distribution of the carbonate molecular anion, is developed. The system shows the evolution of highly temperature-dependent complex low-dimensional structures which control the dynamics (and hence the liquid fragility). By varying the molecular anion charge distribution, the key interactions responsible for the formation of these structures can be identified and rationalized. An increase in the mean charge separation within the carbonate ions increases the connectivity of the emerging structures and leads to an increase in the system fragility.

DOI 10.1021/acs.jpca.7b10712
ISSN 1520-5215
Citation Wilson M, Ribeiro MC, Wilding MC, Benmore C, Weber JK, Alderman O, et al. Structure and Liquid Fragility in Sodium Carbonate. J Phys Chem A. 2018.

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