Abstract
We have carried out ab initio simulations on the ambient pressure phase I of solid ammonia, and on the high-pressure phase IV. Our plane-wave pseudopotential calculations yield very good agreement with existing structural data, lattice energies, and equations of state. We have also studied the tendency toward symmetrization of the hydrogen bonds at high pressures and find that, unlike pure ice, this process should not occur at experimentally achievable pressures, i.e., <300 GPa. Moreover, our results show that ammonia IV does not contain a bifurcated hydrogen bond, as has previously been suggested.
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Dates
Type | When |
---|---|
Created | 22 years, 5 months ago (March 20, 2003, 6:17 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 7, 2024, 6:08 a.m.) |
Indexed | 1 year, 3 months ago (May 24, 2024, 1:37 p.m.) |
Issued | 22 years, 5 months ago (April 1, 2003) |
Published | 22 years, 5 months ago (April 1, 2003) |
Published Print | 22 years, 5 months ago (April 1, 2003) |
@article{Fortes_2003, title={Hydrogen bonding in solid ammonia from ab initio calculations}, volume={118}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1555630}, DOI={10.1063/1.1555630}, number={13}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Fortes, A. D. and Brodholt, J. P. and Wood, I. G. and Vočadlo, L.}, year={2003}, month=apr, pages={5987–5994} }