Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

In situ high-pressure/low-temperature synchrotron x-ray diffraction and optical Raman spectroscopy were used to examine the structural properties, equation of state, and vibrational dynamics of ice VIII. The x-ray measurements show that the pressure-volume relations remain smooth up to 23 GPa at 80 K. Although there is no evidence for structural changes to at least 14 GPa, the unit-cell axial ratio c∕a undergoes changes at 10–14 GPa. Raman measurements carried out at 80 K show that the νTzA1g+νTx,yEg lattice modes for the Raman spectra of ice VIII in the lower-frequency regions (50–800cm−1) disappear at around 10 GPa, and then a new peak of ∼150cm−1 appears at 14 GPa. The combined data provide evidence for a transition beginning near 10 GPa. The results are consistent with recent synchrotron far-IR measurements and theoretical calculations. The decompressed phase recovered at ambient pressure transforms to low-density amorphous ice when heated to ∼125K.

Bibliography

Yoshimura, Y., Stewart, S. T., Somayazulu, M., Mao, H., & Hemley, R. J. (2006). High-pressure x-ray diffraction and Raman spectroscopy of ice VIII. The Journal of Chemical Physics, 124(2).

Authors 5
  1. Yukihiro Yoshimura (first)
  2. Sarah T. Stewart (additional)
  3. Maddury Somayazulu (additional)
  4. Ho-kwang Mao (additional)
  5. Russell J. Hemley (additional)
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Dates
Type When
Created 19 years, 7 months ago (Jan. 5, 2006, 6:04 p.m.)
Deposited 2 years, 1 month ago (June 30, 2023, 4:17 p.m.)
Indexed 3 weeks, 1 day ago (July 30, 2025, 6:45 a.m.)
Issued 19 years, 7 months ago (Jan. 9, 2006)
Published 19 years, 7 months ago (Jan. 9, 2006)
Published Online 19 years, 7 months ago (Jan. 9, 2006)
Published Print 19 years, 7 months ago (Jan. 14, 2006)
Funders 0

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@article{Yoshimura_2006, title={High-pressure x-ray diffraction and Raman spectroscopy of ice VIII}, volume={124}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.2140277}, DOI={10.1063/1.2140277}, number={2}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Yoshimura, Yukihiro and Stewart, Sarah T. and Somayazulu, Maddury and Mao, Ho-kwang and Hemley, Russell J.}, year={2006}, month=jan }