UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Ab initio simulation of the ice II structure

Fortes, AD; Wood, IG; Brodholt, JP; Vocadlo, L; (2003) Ab initio simulation of the ice II structure. J CHEM PHYS , 119 (8) 4567 - 4572. 10.1063/1.1593630.

Full text not available from this repository.

Abstract

We have carried out ab initio simulations on the high-pressure polymorph of solid water, ice II, a phase for which there is a surprising lack of experimental data. We report our calculated third-order Birch-Murnaghan equation of state for ice II: the zero pressure and temperature density, rho(0)=1240.27+/-0.62 kg m(-3), bulk modulus, K-0=16.18+/-0.12 GPa, with the first pressure derivative of the bulk modulus, K-0('), fixed equal to 6.0. These parameters, the unit cell dimensions, and the atomic positions are in good agreement with experimental values. We also describe the way in which the change in unit cell volume is accommodated within the structure, primarily by contraction of the distance between neighboring hexagonal tubes-the principal structural element of ice II. This is in agreement with existing experimental data. (C) 2003 American Institute of Physics.

Type:Article
Title:Ab initio simulation of the ice II structure
DOI:10.1063/1.1593630
Keywords:HIGH-PRESSURE, NEUTRON DIFFRACTION, LOW-TEMPERATURE, PHASE-DIAGRAM, ELECTRON-GAS, AMMONIA, POLYMORPHS, SYSTEMS, ENERGY
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Earth Sciences

Archive Staff Only: edit this record