Abstract
The effect of pressure on the infrared spectra of H2O and D2O ice VII has been studied at room temperature and pressures between 2 and 15 GPa with a Fourier transform infrared spectrometer and a diamond anvil high‐pressure cell. Two librational modes (νREu2 and νREu3), one bending mode ν2A2u1), and various overtone bands are well resolved. The stretching modes, ν1 and ν3, are poorly resolved due to overlap with diamond window absorption. Although νREu3 shows a very strong shift to higher frequency with pressure, ν1 and ν3 shift to lower frequencies, and all other lines vary only slightly with pressure. Differences between the spectra of H2O and D2O are discussed.
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