Density deficit of Earth’s core revealed by a multimegabar primary pressure scale Article Swipe
Daijo Ikuta
,
Eiji Ohtani
,
Hiroshi Fukui
,
Tatsuya Sakamaki
,
R. Heid
,
Daisuke Ishikawa
,
Alfred Q. R. Baron
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1126/sciadv.adh8706
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.1126/sciadv.adh8706
An accurate pressure scale is a fundamental requirement to understand planetary interiors. Here, we establish a primary pressure scale extending to the multimegabar pressures of Earth’s core, by combined measurement of the acoustic velocities and the density from a rhenium sample in a diamond anvil cell using inelastic x-ray scattering and x-ray diffraction. Our scale agrees well with previous primary scales and shock Hugoniots in each experimental pressure range and reveals that previous scales have overestimated laboratory pressures by at least 20% at 230 gigapascals. It suggests that the light element content in Earth’s inner core (the density deficit relative to iron) is likely to be double what was previously estimated, or Earth’s inner core temperature is much higher than expected, or some combination thereof.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1126/sciadv.adh8706
- https://www.science.org/doi/pdf/10.1126/sciadv.adh8706?download=true
- OA Status
- gold
- Cited By
- 11
- References
- 93
- Related Works
- 10
- OpenAlex ID
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All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4386553211Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1126/sciadv.adh8706Digital Object Identifier
- Title
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Density deficit of Earth’s core revealed by a multimegabar primary pressure scaleWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2023Year of publication
- Publication date
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2023-09-08Full publication date if available
- Authors
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Daijo Ikuta, Eiji Ohtani, Hiroshi Fukui, Tatsuya Sakamaki, R. Heid, Daisuke Ishikawa, Alfred Q. R. BaronList of authors in order
- Landing page
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https://doi.org/10.1126/sciadv.adh8706Publisher landing page
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https://www.science.org/doi/pdf/10.1126/sciadv.adh8706?download=trueDirect link to full text PDF
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YesWhether a free full text is available
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goldOpen access status per OpenAlex
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https://www.science.org/doi/pdf/10.1126/sciadv.adh8706?download=trueDirect OA link when available
- Concepts
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Inner core, Diamond anvil cell, Core (optical fiber), Earth (classical element), Scale (ratio), Rhenium, Outer core, Geology, Diffraction, Materials science, Physics, Mineralogy, Computational physics, Geophysics, Optics, Astronomy, Metallurgy, Quantum mechanicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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11Total citation count in OpenAlex
- Citations by year (recent)
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2025: 6, 2024: 5Per-year citation counts (last 5 years)
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93Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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| citation_normalized_percentile.value | 0.93199606 |
| citation_normalized_percentile.is_in_top_1_percent | False |
| citation_normalized_percentile.is_in_top_10_percent | True |