Abstract
We have investigated a series of changes in in-situ Raman spectra as a function of pressure at 264 K to study the process of bulk melting in Ih (hexagonal ice) to the liquid water. We succeeded in measuring spectra where ice Ih coexists with liquid water at an equilibrium pressure of 0.1 GPa The lowest frequency peak which is derived from the strong hydrogen-bonds of ice Ih lattice remains until the transition and the fraction of liquid water at this equilibrium increases upon compression. The results are interpreted in the context of pre-melting effects in the ice particles.
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