Structural transitions in hydrogen and deuterium at ultrahigh pressures |
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| Authors: | R. J. Hemley H. K. Mao |
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| Affiliation: | Geophysical Laboratory , Carnegie Institution of Washington , 2801 Upton St. N. W., Washington , D. C. , 20008 , U.S.A. |
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| Abstract: | Abstract Raman measurements indicate that normal hydrogen and deuterium compressed in a diamond-anvil cell at 77 K undergo phase transformations at 145 (±l5) GPa and 190 (±l20) GPa, respectively. The new observations reported for deuterium indicate that the transition in both isotopes is a structural change not associated with a simple rotational ordering mechanism. The possibility of a structural transition driven by band-gap closure is discussed. |
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| Keywords: | hydrogen phase transitions diamond-anvil cell |
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