-
- Guillaume Fiquet
- Laboratoire de Minéralogie et Cristallographie, UMR CNRS 7590, Université Paris VI, 4 Place Jussieu, 75252 Paris cedex 06, France.
-
- James Badro
- Laboratoire de Minéralogie et Cristallographie, UMR CNRS 7590, Université Paris VI, 4 Place Jussieu, 75252 Paris cedex 06, France.
-
- François Guyot
- Laboratoire de Minéralogie et Cristallographie, UMR CNRS 7590, Université Paris VI, 4 Place Jussieu, 75252 Paris cedex 06, France.
-
- Herwig Requardt
- European Synchrotron Radiation Facility, BP220, 38043 Grenoble cedex, France.
-
- Michael Krisch
- European Synchrotron Radiation Facility, BP220, 38043 Grenoble cedex, France.
書誌事項
- 公開日
- 2001-01-19
- DOI
-
- 10.1126/science.291.5503.468
- 公開者
- American Association for the Advancement of Science (AAAS)
この論文をさがす
説明
<jats:p> The dispersion of longitudinal acoustic phonons was measured by inelastic x-ray scattering in the hexagonal closed-packed (hcp) structure of iron from 19 to 110 gigapascals. Phonon dispersion curves were recorded on polycrystalline iron compressed in a diamond anvil cell, revealing an increase of the longitudinal wave velocity ( <jats:italic>V</jats:italic> <jats:sub>P</jats:sub> ) from 7000 to 8800 meters per second. We show that hcp iron follows a Birch law for <jats:italic>V</jats:italic> <jats:sub>P</jats:sub> , which is used to extrapolate velocities to inner core conditions. Extrapolated longitudinal acoustic wave velocities compared with seismic data suggest an inner core that is 4 to 5% lighter than hcp iron. </jats:p>
収録刊行物
-
- Science
-
Science 291 (5503), 468-471, 2001-01-19
American Association for the Advancement of Science (AAAS)
