Dissociation of CH <sub>4</sub> at High Pressures and Temperatures: Diamond Formation in Giant Planet Interiors?
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- Laura Robin Benedetti
- Department of Physics,
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- Jeffrey H. Nguyen
- H-Division, Physics Directorate, Lawrence Livermore National Laboratory, Livermore, CA 94551, USA.
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- Wendell A. Caldwell
- Department of Geology and Geophysics,
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- Hongjian Liu
- Department of Geology and Geophysics,
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- Michael Kruger
- Department of Physics, 4747 Troost, Room 227, University of Missouri, Kansas City, MO 64110, USA.
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- Raymond Jeanloz
- Department of Geology and Geophysics,
書誌事項
- 公開日
- 1999-10
- DOI
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- 10.1126/science.286.5437.100
- 公開者
- American Association for the Advancement of Science (AAAS)
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説明
<jats:p> Experiments using laser-heated diamond anvil cells show that methane (CH <jats:sub>4</jats:sub> ) breaks down to form diamond at pressures between 10 and 50 gigapascals and temperatures of about 2000 to 3000 kelvin. Infrared absorption and Raman spectroscopy, along with x-ray diffraction, indicate the presence of polymeric hydrocarbons in addition to the diamond, which is in agreement with theoretical predictions. Dissociation of CH <jats:sub>4</jats:sub> at high pressures and temperatures can influence the energy budgets of planets containing substantial amounts of CH <jats:sub>4</jats:sub> , water, and ammonia, such as Uranus and Neptune. </jats:p>
収録刊行物
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- Science
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Science 286 (5437), 100-102, 1999-10
American Association for the Advancement of Science (AAAS)
