title: Prediction of physical properties of water under extremely supercritical conditions: a molecular dynamics study.
abstract: The physical properties of water under a wide range of pressure and temperature conditions are important in fundamental physics, chemistry, and geoscience. Molecular simulations are useful for predicting and understanding the physical properties of water at phases extremely different from ambient conditions. In this study, we developed a new five-site flexible induced point charge model to predict the density, static dielectric constant, and transport properties of water in the extremely supercritical phase at high temperatures and pressures of up to 2000 K and 2000 MPa. The model satisfactorily reproduced the density, radial distribution function, static dielectric constant, reorientation time, and self-diffusion coefficients of water above the critical points. We also developed a database of the static dielectric constant, which is useful for discussing the electrical conductivity of aqueous fluids in the earth's crust and mantle.
authors.affiliation: Department of Earth & Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 1528551, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Sakuma
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ichiki
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Kawamura
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Fuji-ta