Physical properties of terrestrial planet's components at multi-megabar range; Implication for the Super-Earth's interior

• Project/Area Number: 23684038
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: Ehime University (2012-2014); Tohoku University (2011)
• Principal Investigator: SAKAI Takeshi 愛媛大学, 地球深部ダイナミクス研究センター, 助教 (90451616)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000); Fiscal Year 2014: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2013: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2012: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2011: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
• Keywords: レーザー加熱式ダイヤモンドアンビルセル / 2段式加圧型ダイヤモンドアンビルセル / ポストペロブスカイト / マルチメガバール / 状態方程式 / スーパーアース / 惑星内部構造 / 超高圧物性 / 物性実験 / 固体地球物理学 / 2段式ダイヤモンドアンビルセル / マイクロアンビル

Outline of Final Research Achievements

The equations of state at multi-megabar range of oxide (MgO, Al2O3), silicate (MgSiO3, Mg3Al2Si3O12), and iron alloys (Fe, Fe-Ni, Fe-Ni-S, (Fe,Ni)3S) are established. These equations of state are applicable to the discussion of the internal structure of Super-Earth which has a few times mass of the Earth. Moreover, the double stage micro-paired diamond anvils are newly developed, and it successfully generates over 300 giga-pascal.

Research Products

• [Journal Article] High-pressure generation using double stage micro-paired diamond anvils shaped by focused ion beam (2015)
  • Author(s): T. Sakai, T. Yagi, H. Ohfuji, T. Irifune, Y. Ohishi, N. Hirao, Y. Suzuki, Y. Kuroda, T. Asakawa, T. Kanemura
  • Journal Title: Review of Scientific Instruments Volume: 86 Issue: 1 Pages: 033905-033905
  • DOI: 10.1063/1.4914844
  • Peer Reviewed / Open Access
• [Journal Article] Equation of state of pure iron and FeO.9NiO.1 alloy up to 3 Mbar (2014)
  • Author(s): Takeshi Sakai, Suguru Takahashi, Naoya Nishitani, Izumi Mashino, Eiji Ohtani, Naohisa Hirao
  • Journal Title: Physics of the Earth and Planetary Interiors Volume: 228 Pages: 114-126
  • DOI: 10.1016/j.pepi.2013.12.010
  • Peer Reviewed
• [Journal Article] Equation of state of Fe3S at room temperature up to 2 megabars (2014)
  • Author(s): Kamada S., Ohtani E., Terasaki H., Sakai T., Takahashi S., Hirao N., Ohishi Y.
  • Journal Title: Physics of the Earth and Planetary Interiors Volume: 228 Pages: 106-113
  • DOI: 10.1016/j.pepi.2013.11.001
  • Peer Reviewed
• [Journal Article] The sound velocity measurements of Fe3S (2014)
  • Author(s): eiji Kamada, Eiji Ohtani, Hiroshi Fukui, Takeshi Sakai, Hidenori Terasaki, Suguru Takahashi, Yuki Shibazaki, Satoshi Tsutsui, Alfred Q. R. Baron, Naohisa Hirao, Yasuo Ohishi
  • Journal Title: American Mineralogist Volume: 99 Issue: 1 Pages: 98-101
  • DOI: 10.2138/am.2014.4463
  • Peer Reviewed
• [Journal Article] A compact system for generating extreme pressures and temperatures : An application of laser-heated diamond anvil cell to inelastic X-ray scattering. (2013)
  • Author(s): Fukui H., Sakai T., Sakamaki T., Kamada S., Takahashi S., Ohtani E., Baron AQR.
  • Journal Title: Review of scientific lnstruments Volume: 84 Issue: 11 Pages: 113902-113902
  • DOI: 10.1063/1.4826497
  • Peer Reviewed
• [Journal Article] Sound velocity of hexagonal close-packed iron up to core pressures (2013)
  • Author(s): Ohtani, E., Y. Shibazaki, T. Sakai, K. Mibe, H. Fukui, S. Kamada, T. Sakamaki, Y. Seto, S. Tsutsui, and A. Q. R. Baron
  • Journal Title: Geophysical Research Letters Volume: 40 Issue: 19 Pages: 1-6
  • DOI: 10.1002/grl.50992
  • Peer Reviewed
• [Journal Article] Jadeite formation in shocked ordinary chondrites (2013)
  • Author(s): Miyahara, M., S. Ozawa, E. Ohtani, M. Kimura, T. Kubo, T. Sakai, T. Nagase, M. Nishijima, N. Hirao
  • Journal Title: Earth and Planetary Science Letters Volume: 373 Pages: 102-108
  • DOI: 10.1016/j.epsl.2013.04.023
  • Peer Reviewed
• [Journal Article] Discovery of seifertite in a shocked lunar meteorite. (2013)
  • Author(s): Miyahara M., Kaneko S., Ohtani E., Sakai T., Nagase T., Kayama M., Nishido H. and Hirao N.
  • Journal Title: Nature Communications Volume: 4 Issue: 1 Pages: 1737-1737
  • DOI: 10.1038/ncomms2733
  • Peer Reviewed
• [Journal Article] Compression of Fe88.1Ni9.1S2.8 alloy up to the pressure of Earth's inner core (2011)
  • Author(s): Sakai T., Ohtani E., Kamada S., Terasaki H., Hirao N.
  • Journal Title: Journal of Geophysical Research Volume: 117 Issue: B2 Pages: 7-7
  • DOI: 10.1029/2011jb008745
  • Peer Reviewed
• [Journal Article] Phase stability and compression study of (Fe_<0.89>, Ni_<0.11>)_3S up to pressure of the Earth's core (2011)
  • Author(s): Sakai, T., E.Ohtani, H.Terasaki, S.Kamada, N.Hirao, Y.Ohishi, N.Sata
  • Journal Title: American Mineralogist Volume: 96 Issue: 10 Pages: 1490-1494
  • DOI: 10.2138/am.2011.3822
  • Peer Reviewed
• [Presentation] Thermal equations of state of MgSiO3 post-bridgmanite phase (2015)
  • Author(s): Sakai, T., Dekura, H., Hirao, N.
  • Organizer: Japan Geoscience Union Meeting 2015
  • Place of Presentation: Makuhari Messe, Chiba, Makuhari
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] Simultaneous volume measurement of MgO and Pt up to 3 Mbar (2014)
  • Author(s): Sakai, T.
  • Organizer: The Sixth Meeting of Research Consortium on High-pressure Research
  • Place of Presentation: Kumamoto University, Kumamoto, Kumamoto
  • Year and Date: 2014-09-25 – 2014-09-27
  • Invited
• [Presentation] Equation of state of MgSiO3 post-perovskite: Implications for the internal structure of super-Earth (2014)
  • Author(s): Sakai, T., Dekura, H., Hirao
  • Organizer: Asia Oceania Geosciences Society (AOGS) 2014, 11th Annual Meeting
  • Place of Presentation: Royton Sapporo Hotel, Hokkaido, Sapporo, Japan.
  • Year and Date: 2014-07-28 – 2014-08-01
• [Presentation] Equation of state of (Fe,Ni)3S phase - Implications for Mars internal structure (2014)
  • Author(s): Akagi, S., Sakai, T., Hirao, N.
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: パシフィコ横浜，神奈川，横浜
  • Year and Date: 2014-04-28 – 2014-05-03
• [Presentation] Ultra high pressure generation using the double-stage diamond anvil cell (2014)
  • Author(s): T. Sakai, T. Yagi, H. Ohfuji, T. Irifune, Y. Ohishi, N. Hirao, Y. Suzuki, Y. Kuroda, T. Asakawa, T. Kanemura
  • Organizer: Japan Geoscience Union Meeting 2014
  • Place of Presentation: パシフィコ横浜，神奈川，横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Presentation] Equations of state of iron and Fe0.9Ni0.1 alloy (2014)
  • Author(s): Sakai, T.., Takahashi S., Nishitani N., Mashino I., Ohtani E., Hirao N.
  • Organizer: Workshop on Elasticity and Iron
  • Place of Presentation: Hyogo, Japan
• [Presentation] Sound velocity of iron up to 160 Gigapascals and 3000 Kelvin (2014)
  • Author(s): Sakamaki T, Ohtani E., Fukui H., Kamada S., Takahashi S., Sakairi T., Takahata A., Sakai, T.., Tsutsui S., Baron A. Q. R.
  • Organizer: Workshop on Elasticity and Iron
  • Place of Presentation: Hyogo, Japan
• [Presentation] Sound velocity-density relation for dhcp-FeH using inelastic X-ray scattering and in situ X-ray diffractions methods (2014)
  • Author(s): Shibazaki Y., Ohtani E., Fukui H., Sakai, T.., Kamada S., Tsutsui S., Baron A. Q. R., Hirao N.
  • Organizer: Workshop on Elasticity and Iron
  • Place of Presentation: Hyogo, Japan
• [Presentation] Stability and melting relations of Fe3C up to 3 Mbar: Implication for the carbon in the Earth's inner core (2013)
  • Author(s): Takahashi, S., Ohtani, E., Sakai, T.., Mashino, I., Kamada, S., Miyahara, M., Sakamaki, T., Hirao, N. and Ohishi, Y.
  • Organizer: AGU Fall Meeting 2013
  • Place of Presentation: San Francisco, USA
• [Presentation] Amount of sulfur in the inner core based on sound velocities and EOS of Fe3S at high pressures (2013)
  • Author(s): Kamada, S., Ohtani, E., Terasaki, H., Sakai, T.., Fukui, H., Takahashi, S., Baron, A. Q. R., Hirao, N. and Ohishi, Y.
  • Organizer: Japan Geoscience Union Meeting 2013
  • Place of Presentation: Chiba, Japan
• [Presentation] Evidence for a dynamic event recorded in HED meteorites (2013)
  • Author(s): Miyahara, M., Ohtani, E., Yamaguchi, A., Ozawa, S., Sakai, T.., and Hirao, N.
  • Organizer: Japan Geoscience Union Meeting 2013
  • Place of Presentation: Chiba, Japan
• [Presentation] Sound velocity of iron-light-element alloys at high pressure and temperature and composition and thermal state of the inner core (2013)
  • Author(s): Ohtani, E., Sakai, T.., Kamada, S., Sakamaki, T., Mibe, K., Shibazaki, Y., Fukui, H., Tsutsui, S. and Baron, A. Q. R.
  • Organizer: Japan Geoscience Union Meeting 2013
  • Place of Presentation: Chiba, Japan
• [Presentation] Melting relation in the Fe-S-Si system at high pressure and temperature: Implications for the Earth's core (2013)
  • Author(s): Sakairi, T., Ohtani, E., Sakai, T.., Kamada, S., Miyahara, M., Hirao, N. and Ohishi, Y.
  • Organizer: Japan Geoscience Union Meeting 2013
  • Place of Presentation: Chiba, Japan
• [Presentation] A new mechanism for transport of water into CMB (2013)
  • Author(s): Ohtani E., Ohira I., Sakai, T.., Miyahara M., Hirao N., Ohishi Y., Nishijima M.
  • Organizer: Goldschmidt 2013
  • Place of Presentation: Florence, Italy
• [Presentation] Discovery of coesite and stishovite from eucrite (2013)
  • Author(s): Miyahara M., Ohtani E., Yamaguchi A., Ozawa S., Sakai, T.., Hirao N.
  • Organizer: Goldschmidt 2013
  • Place of Presentation: Florence, Italy
• [Presentation] MgSiO3ポストぺロフスカイト相の状態方程式 (2013)
  • Author(s): 境毅，出倉春彦，平尾直久
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 新潟
• [Presentation] マイクロダイヤモンドアンビルを用いた超高圧発生実験 (2013)
  • Author(s): 八木健彦，境毅，大藤弘明，入舩徹男，大石泰生，平尾直久，鈴木裕也，黒田靖，浅川孝之，金村崇
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 新潟
• [Presentation] 高温高圧下におけるFe-S-Si系の元素分配 (2013)
  • Author(s): 坂入崇紀，大谷栄治，境毅，鎌田誠司，宮原正明，平尾直久
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 新潟
• [Presentation] Ｘ線非弾性散乱によるhcp-Feの縦波速度測定 (2013)
  • Author(s): 大谷栄治，坂巻竜也，福井裕史，鎌田誠司，高橋豪，坂入崇紀，高畑明拓，境毅，筒井聡，Baron Alfred
  • Organizer: 日本鉱物科学会2013年年会
  • Place of Presentation: 筑波
• [Presentation] MgSiO3ポストペロブスカイト相の状態方程式 (2013)
  • Author(s): 境毅，平尾直久
  • Organizer: 日本地球惑星科学連合大会2013
  • Place of Presentation: 千葉
• [Presentation] Nickel effect on the density and bulk modulus; Implication for the terrestrial planet’s core (2013)
  • Author(s): Sakai, T.
  • Organizer: The 3rd Global-COE international symposium on Deep Earth Mineralogy in conjunction with TANDEM 2013
  • Place of Presentation: Matsuyama, Ehime
• [Presentation] Equation of state of Fe-Ni Alloy at multi-megabar pressure (2012)
  • Author(s): Sakai T., E. Ohtani, N. Hirao
  • Organizer: Joint 2012 COMPRES Annual Meeting and High-Pressure Mineral Physics Seminar-8
  • Place of Presentation: Lake Tahoe, CA, USA
  • Invited
• [Presentation] Equations of state of core materials; implication for the core (2012)
  • Author(s): Sakai T., S. Takahashi, N. Nishitani, I. Mashino, E. Ohtani, N. Hirao
  • Organizer: G-COE International Symposium “Achievements of G-COE Program for Earth and Planetary Dynamics and the Future Perspective
  • Place of Presentation: Sendai, Miyagi
  • Invited
• [Presentation] Equation of state of Fe and Fe-Ni alloy at multi-megabar (2012)
  • Author(s): Sakai, T., Takahashi, S., Nishitani, N., Mashino, I., Ohtani, E., Hirao, N.
  • Organizer: AGU Fall Meeting 2012
  • Place of Presentation: San Francisco, CA, USA
  • Invited
• [Presentation] Phase stability and equation of state of Fe-Ni-X at Multi Mbar (2012)
  • Author(s): Sakai, T.
  • Organizer: CECAM workshop “New insights on metals under extreme conditions
  • Place of Presentation: Institut Henri Poincar&eacute;, Paris, France
  • Invited
• [Presentation] Fe0.9Ni0.1合金の状態方程式 (2012)
  • Author(s): 境毅，高橋豪，西谷尚也，増野いづみ，大谷栄治，平尾直久
  • Organizer: 第53回高圧討論会
  • Place of Presentation: 大阪
• [Presentation] ３Dラマンマッピングを使ったDACの応力分布可視化II (2012)
  • Author(s): 野口直樹，境毅，鍵裕之
  • Organizer: 第53回高圧討論会
  • Place of Presentation: 大阪
• [Presentation] The compression study of MgO up to 3Mbar (2012)
  • Author(s): Sakai, T., N.Nishitani, E.Ohtani, N.Hirao
  • Organizer: Joint symposium of Misasa-2012 and Geofluid-2
  • Place of Presentation: BlancArt Misasa, Tottori, Japan(INVITED)
• [Presentation] The effect of light elements on Earth's core properties (2012)
  • Author(s): Sakai, T, S.Takahashi, Y.Shibazaki, S.Kamada, H.Terasaki, E.Ohtani
  • Organizer: 9th International Workshop on WATER DYNAMICS
  • Place of Presentation: Sendai International Center, Sendai, Japan
• [Presentation] The compression study of MgO up to 3Mbar (2011)
  • Author(s): Sakai, T., N.Nishitani, E.Ohtani, N.Hirao
  • Organizer: AGU fall meeting 2011
  • Place of Presentation: USA, California, San Francisco, Moscone Convention Center
• [Presentation] MgOの308GPaまでの圧縮挙動 (2011)
  • Author(s): 境毅, 西谷尚也, 大谷栄治, 平尾直久
  • Organizer: 第52回高圧討論会
  • Place of Presentation: 那覇、沖縄、沖縄キリスト教学院
• [Presentation] (Fe,Ni)_3S相の安定性と圧縮挙動 (2011)
  • Author(s): 境毅, 大谷栄治、寺崎英紀、鎌田誠司、平尾直久、宮原正明、西嶋雅彦
  • Organizer: 日本地質学会大118年学術大会・日本鉱物科学会2011年年会合同学術大会
  • Place of Presentation: 水戸、茨城、茨城大学
• [Presentation] Pressure generation using micro size nano-polycrystalline diamond anvil
  • Author(s): Yagi, T. Sakai, T., Irifune, T., Suzuki, Y., and Kuroda, Y.
  • Organizer: APS-SCCM & AIRAPT-24 Joint Conference
  • Place of Presentation: Washington, USA
• [Remarks] 境助教らの論文がRev. Sci. Instrum.誌のEditor’s Picksに選出
  • URL: http://www.ehime-u.ac.jp/news/detail_9377.html
• [Remarks] 境助教らの論文がRev. Sci. Instrum.誌のEditor’s Picksに選出
  • URL: http://www.grc.ehime-u.ac.jp/archives/2489