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Volumn 281, Issue 5378, 1998, Pages 809-812

In situ observations of a high-pressure phase of H2O ice

Author keywords

[No Author keywords available]

Indexed keywords

ICE; WATER;

EID: 0032493872     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.281.5378.809     Document Type: Article
Times cited : (116)

References (35)
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    • Clarendon Press, Oxford, See, for example, figure 1.19
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    • note
    • The sample was cooled by a stream of cold nitrogen and heated by two individual heaters, and the sample temperatures were detected by two K-type thermocouples in direct contact with the diamonds; for the reported temperatures, the precision is ±0.1°C and accuracy is ±0.5°C The images of the sample under a microscope, together with the temperature and time information, were recorded continuously on videotape.
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    • note
    • 3 (on the basis of the melting point of ice V). The two calculated pressures for the melting of the new phase at 8.1°C agree. Similar results were also obtained for other melting temperatures (Fig. 3) even under more extreme P-T conditions where uncertainties are involved in extrapolating both the melting curve of ice V (18) and the equation of state of water (19).
  • 25
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    • note
    • A quantitative determination of the birefringence cannot be made because samples were viewed between the two diamonds, the tips of which become birefringent under stress.
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    • T. C. Sivakumar and S. A. Rice, J. Chem. Phys. 69, 3468 (1978); D. D. Klug, O. Mishima, E. Whalley, ibid. 86, 5323 (1987). These amorphous forms are reportedly stable only at lower temperatures.
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    • These amorphous forms are reportedly stable only at lower temperatures
    • T. C. Sivakumar and S. A. Rice, J. Chem. Phys. 69, 3468 (1978); D. D. Klug, O. Mishima, E. Whalley, ibid. 86, 5323 (1987). These amorphous forms are reportedly stable only at lower temperatures.
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    • note
    • -1, which was not observed for the new phase.
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    • 2/nmc. Our results indicate that the new phase is more extensively disordered. Because of the lack of data, it is difficult to speculate the relation, if any, between the new phase and the one recently found at lower pressures by Lobban et al. (14).
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    • note
    • We thank W. A. Bassett, H. T. Haselton Jr., E. Karmon, and V. V. Struzhkin for assistance with experiments, and P. B. Barton Jr. and R. R. Seal for reviews. Supported by the U.S. Geological Survey (Deep Continental Studies Program), NSF (D.M.R. and E.A.R.), and NASA.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.