INTERPLAY BETWEEN MOLECULAR SIMULATION AND NEUTRON-SCATTERING IN DEVELOPING NEW INSIGHTS INTO THE STRUCTURE OF WATER

For three decades, molecular models for water, nature's most important liquid, have been developed and refined by fitting to structure measu red by neutron scattering. The decade-old widely accepted structure of water at room temperature and pressure was recently revised as a bypr oduct of attempts to understand the structure of high-temperature/high -pressure water for which, in a remarkable reversal of roles, molecula r models successfully pinpointed inaccuracies in scattering data. Subs equent improvements in analyzing scattering data have led to reevaluat ion of water structure at normal conditions. This remarkable interplay between molecular modeling and experiment suggests molecular methods can effectively complement scattering experiments.