Fig. 1. A sketch showing the experimental settings for the high-pressure cell combined with in situ Raman spectroscopic measurement

Fig. 2. Raman spectra of H₂O at temperatures of 253~753 K and a pressure of 30 MPa (The data are from Ref.[28])
ν_B: The bending mode; ν_L+B: The sum frequency of librational and bending; ν_FHW: The fully hydrogen bonded water; ν_PHW: The partially hydrogen bonded water

Fig. 3. Fitting and assigning of the OD/OH stretching bands

Fig. 4. Raman spectra of isotopic substitution water with VH2O/VD2O=1/0, 4/1, 1/1, 1/4, 0/1 at 303~573 K (Data are from Ref.[31,32])

Fig. 5. Raman spectra of H₂O/D₂O—NaCl solutions at 273~573 K (Data are from Ref.[35])