Compression of ice to 210 gigapascals: Infrared evidence for a symmetric hydrogen-bonded phase

Science

Volumn 273, Issue 5272, 1996, Pages 218-220

  Goncharov, A F ^a   Struzhkin, V V ^a   Somayazulu, M S ^a   Hemley, R J ^a   Mao, H K ^a  

^a GEOPHYSICAL LABORATORY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ICE;

ARTICLE; COMPRESSION; FREEZING; PRESSURE; PRIORITY JOURNAL; STRUCTURE ANALYSIS;

EID: 0029825875     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.273.5272.218     Document Type: Article

References (32)

1. Ph. Pruzan, J. Mol. Struct, 322, 279 (1994).
2. W. B. Holzapfel, J. Chem. Phys. 56, 712 (1972).
3. F. H. Stillinger and K. S. Schweitzer, J. Phys. Chem. 87, 4281 (1983).
4. C. Lee, D. Vanderbilt, K. Laasonen, R. Car, M. Parrinello, Phys. Rev. Lett. 69, 462 (1992); Phys. Rev. B 47, 4863 (1993).
5. C. Lee, D. Vanderbilt, K. Laasonen, R. Car, M. Parrinello, Phys. Rev. Lett. 69, 462 (1992); Phys. Rev. B 47, 4863 (1993).
6. P. Demonte, R. LeSar, M. L. Klein, Phys. Rev. Lett. 60, 2284 (1989); Phys. Rev. B 40, 2716 (1989).
7. P. Demonte, R. LeSar, M. L. Klein, Phys. Rev. Lett. 60, 2284 (1989); Phys. Rev. B 40, 2716 (1989).
8. J. Hama, K. Suito, M. Watanabe, High Pressure Research in Mineral Physics: Application to Earth and Planetary Sciences (Terra Scientific, Tokyo - American Geophysical Union, Washington, DC 1992), p. 403.
9. M. Benoit, M. Bernasconi, P. Focher, M. Parrinello, Phys. Rev. Lett. 76, 2934 (1996).
10. Ph. Pruzan, J. C. Chervin, M. Gauthier, Europhys. Lett. 13, 81 (1990); Ph. Pruzan, J. C. Chervin, B. Canny, J. Chem Phys. 99, 9842 (1993).
11. Ph. Pruzan, J. C. Chervin, M. Gauthier, Europhys. Lett. 13, 81 (1990); Ph. Pruzan, J. C. Chervin, B. Canny, J. Chem Phys. 99, 9842 (1993).
12. A. Polian and M. Grimsditch, Phys. Rev. Lett. 52, 1312 (1984).
13. K. R. Hirsch and W. B. Holzapfel, J. Chem. Phys. 84, 2771 (1986).
14. R. J. Hemley et al., Nature 330, 737 (1987). More recent x-ray diffraction measurements to pressures have revealed additional structural information but are consistent with the persistence of a structure based on bcc oxygen (M. Somayazulu et al., unpublished results; Ph. Pruzan et al., European Synchrotron Radiation Facility Annual Report, 1994-1995, p. 12; P. Loubeyre, personal communication).
15. R. J. Hemley et al., Nature 330, 737 (1987). More recent x-ray diffraction measurements to pressures have revealed additional structural information but are consistent with the persistence of a structure based on bcc oxygen (M. Somayazulu et al., unpublished results; Ph. Pruzan et al., European Synchrotron Radiation Facility Annual Report, 1994-1995, p. 12; P. Loubeyre, personal communication).
16. R. J. Hemley et al., Nature 330, 737 (1987). More recent x-ray diffraction measurements to pressures have revealed additional structural information but are consistent with the persistence of a structure based on bcc oxygen (M. Somayazulu et al., unpublished results; Ph. Pruzan et al., European Synchrotron Radiation Facility Annual Report, 1994-1995, p. 12; P. Loubeyre, personal communication).
17. R. J. Nelmes et al., Phys. Rev. Lett. 71, 1192 (1993); J. M. Besson et al., Phys. Rev. B 49, 12540 (1994).
18. R. J. Nelmes et al., Phys. Rev. Lett. 71, 1192 (1993); J. M. Besson et al., Phys. Rev. B 49, 12540 (1994).
19. M. E. Lines and A. M. Glass, Principles and Applications of Ferroelectrics and Related Materials (Ciarendon Press, Oxford, 1977), p. 32.
20. D. D. Klug and E. Whalley, J. Chem. Phys. 81, 1220 (1984).
21. K. Aoki, H. Yamawaki, M. Sakashita, Science 268, 1322 (1995).
22. _, Phys. Rev. Lett. 76, 784 (1996).
23. We performed the measurements on the U2B IR beam line at the National Synchrotron Light Source (NSLS), using a Fourier Iransform-IR (Nicolel 750) spectrometer with KBr beam splitter. The characteristics of the beam line are given by G. L. Carr et al. [Rev. Sci. Instrum. 66, 1643 (1995)]. Synchrotron light passes through the spectrometer and is focused into the diamond anvil cell to spots 20 to 30 μm in diameter (in the visible), using a custom-built IR microscope with Cassegrain mirror objective (numerical aperture = 0.25, ×8). For absorption measurements, a ZnSe lens placed inside a Mao-Bell diamond-anvil cell collects the light transmitted through the sample and images it on a mercury-cadmium telluride detector (MCT). Reflected light is collected by the same mirror objective, which illuminates the sample, applying a half-mirror beam splitter. A separate MCT detector was used to record the reflectivity, which permitted collection of complementary absorption and reflectivity spectra at each pressure.
24. 2 from absorption measurements.
25. H. K. Mao, J. Xu, P. M. Bell, J. Geophys. Res. 91, 4673 (1986).
26. R. J. Hemley, H. K. Mao, A. F. Goncharov, M. Hanfland, V. V. Struzhkin, Phys. Rev. Lett. 76, 1667 (1996).
27. V. V. Struzhkin, A. F. Goncharov, M. Somayazulu, R. J. Hemley, H. K. Mao, in preparation.
28. 1 as a Fano-type interference between a narrow band and the continuum. We find, however, that the observed line shape does not necessarily require interference, because two independent oscillators (the first, a relatively weak and narrow IR band inside a second, the strong and broad reststrahlen band) also give rise to a Fano-like absorption as a result of the complex behavior of the optical conslants (27).
29. Alternatively, calculations using a double-well potential model for the hydrogen bond suggest that this could also arise from splitting of energy levels associated with the changing barrier height (21).
30. The double-well potential calculations also predict a change in proton motion at these pressures (21). Although the spectroscopic features at 150 to 160 GPa are indicative of a type of Fermi resonance, a second phase transition cannot be ruled out
31. A. S. Barker and J. J. Hopfield, Phys. Rev. A 135, 1732 (1964).
32. We are grateful to P Loubeyre, Ph. Pruzan, and J.-M. Besson for comments on the manuscript. This work was supported by the National Science Foundation and NASA. The NSLS is supported by the Department of Energy under contract DE-AC02-76-CH00016.