Elucidating water dynamics in MgCl2 hydrates from molecular dynamics simulation
Huinink HP, Zahn D (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 69
Pages Range: 64-70
DOI: 10.1016/j.solidstatesciences.2017.05.011
Abstract
The water mobility in single crystals of MgCl2 hydrates has been investigated with molecular dynamics. Standard force fields have been benchmarked for molecular dynamics simulations of MgCl2 hydrates. To provide a reliable molecular mechanics model, force fields are selected on their ability to reproduce the structure of MgCl2·6H2O at 300 K. The selected force fields are then tested on their ability to also reproduce the structures of the different hydrates (n = 12, 8, 6, 4, 2, 1) and available thermodynamic data. For the currently best force-field available, constant-temperature, constant-pressure molecular dynamics simulations are preformed to elucidate the mechanisms of hydrate water mobility in perfect single crystals of the tetra- and hexahydrate. Long range water diffusion was not observed; each water molecule remained in the coordination sphere of its original Mg2+ host. However, collective ring-like motions of four water molecules at once within the coordination shell of a Magnesium ion were observed.
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Netherlands (NL)How to cite
APA:
Huinink, H.P., & Zahn, D. (2017). Elucidating water dynamics in MgCl2 hydrates from molecular dynamics simulation. Solid State Sciences, 69, 64-70. https://dx.doi.org/10.1016/j.solidstatesciences.2017.05.011
MLA:
Huinink, Hendrik Pieter, and Dirk Zahn. "Elucidating water dynamics in MgCl2 hydrates from molecular dynamics simulation." Solid State Sciences 69 (2017): 64-70.
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