Density measurements and structure of Fe and Fe-light elements alloy liquid

• Project/Area Number: 16K13902
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Tohoku University
• Principal Investigator: Kamada Seiji 東北大学, 学際科学フロンティア研究所, 助教 (30611793)
• Research Collaborator: TERASAKI Hidenori
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 地球核 / ダイヤモンドアンビルセル / 密度測定 / Ｘ線吸収法 / 非晶質物質 / 放射光 / 高温高圧 / 密度 / 金属ガラス / 高圧 / 構造 / 地球・惑星内部構造 / 高圧高温 / 高圧鉱物物理学 / 物質科学

Outline of Final Research Achievements

The Earth core is divided into liquid and solid cores. Densities of the cores were estimated seismologically and they are smaller than those of pure Fe, suggesting light elements exist in the cores. Therefore, it is very important to investigate densities of core materials. However, it is difficult to measure densities of liquid phases. In this study, I have measured densities of crystalline Fe under high pressures based on an X-ray absorption method in order to establish the method. The densities of Fe were obtained based on the X-ray absorption method and XRD. The densities of Fe based on the X-ray absorption method were consistent with those based on XRD. The difference were less than 2%. This suggests that the X-ray absorption method is a strong method to measure densities, especially liquid and amorphous.

Academic Significance and Societal Importance of the Research Achievements

本研究では、液体鉄合金の密度測定を行なうためにX線吸収法を用いた。これまで本手法での密度測定が完全に確立されていなかったため、結晶性の鉄の密度をXRDとX線吸収法によって求め、手法の比較を行なった。本研究から両手法によって求められた密度は2%以内の差で一致した。本研究の成果によって液体鉄合金の直接密度測定の可能性が開かれ、地球核の密度や組成についてより正確な議論が期待できる。

Research Products

• [Journal Article] Elastic constants of single-crystal Pt measured up to 20 GPa based on inelastic X-ray scattering: Implication for the establishment of an equation of state (2019)
  • Author(s): S. Kamada, H. Fukui, A. Yoneda , H. Gomi, F. Maeda, S. Tsutsui, H. Uchiyama, N. Hirao, D. Ishikawa, A.Q.R. Baron
  • Journal Title: Comptes Rendus Geoscience Volume: - Issue: 2-3 Pages: 236-242
  • DOI: 10.1016/j.crte.2018.11.003
  • Peer Reviewed / Open Access
• [Journal Article] Sound velocity of Fe3C at high pressure and high temperature determined by inelastic X-ray scattering (2018)
  • Author(s): Takahashi Suguru, Ohtani Eiji, Sakamaki Tatsuya, Kamada Seiji, Fukui Hiroshi, Tsutsui Satoshi, Uchiyama Hiroshi, Ishikawa Daisuke, Baron Alfred Q.R.
  • Journal Title: Comptes Rendus Geoscience Volume: 印刷中 Issue: 2-3 Pages: 190-196
  • DOI: 10.1016/j.crte.2018.09.005
  • Peer Reviewed / Open Access
• [Journal Article] Electronic properties and compressional behavior of Fe-Si alloys at high pressure (2018)
  • Author(s): Kamada Seiji、Suzuki Nanami、Maeda Fumiya、Hirao Naohisa、Hamada Maki、Ohtani Eiji、Masuda Ryo、Mitsui Takaya、Ohishi Yasuo、Nakano Satoshi
  • Journal Title: American Mineralogist Volume: 103 Issue: 12 Pages: 1959-1965
  • DOI: 10.2138/am-2018-6425
  • Peer Reviewed
• [Journal Article] Variations of lattice constants and thermal expansion coefficients of indium at high pressure and high temperature (2018)
  • Author(s): Takubo, Y., Terasaki, H., Kondo, T., Mitai, S., Kamada, S., Kikegawa, T. and Machida, A.
  • Journal Title: High Pressure Research Volume: 38 Issue: 4 Pages: 406-413
  • DOI: 10.1080/08957959.2018.1499903
  • Peer Reviewed
• [Journal Article] Development of density measurement for metals at high pressures and high temperatures uding X-ray absorption imaging combined with externally heated diamond anvil cell (2018)
  • Author(s): Yusaku Takubo, Hidenori Terasaki, Tadashi Kondo, Shingo Mitai, Seiji Kamada, Takumi Kikegawa, Akihiko Machida
  • Journal Title: Comptes Rendus Geoscience Volume: - Issue: 2-3 Pages: 182-189
  • DOI: 10.1016/j.crte.2018.04.002
  • Peer Reviewed / Open Access
• [Journal Article] Sound velocity measurements of hcp Fe-Si alloy at high pressure and high temperature by inelastic X-ray scattering (2018)
  • Author(s): Takanori Sakairi, Tatsuya Sakamaki, Eiji Ohtani, Hiroshi Fukui, Seiji Kamada, Satoshi Tsutsui, Hiroshi Uchiyama, Alfred Q.R. Baron
  • Journal Title: American Mineralogist Volume: 103 Issue: 1 Pages: 85-90
  • DOI: 10.2138/am-2018-6072
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Spin state and electronic environment of iron in basaltic glass in the lower mantle (2017)
  • Author(s): Fumiya Maeda, Seiji Kamada, Eiji Ohtani, Naohisa Hirao, Takaya Mitusi, Ryo Masuda, Masaaki Miyahara, Catherine McCammon
  • Journal Title: American Mineralogist Volume: 102 Issue: 10 Pages: 2106-2112
  • DOI: 10.2138/am-2017-6035
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Chemical Reactions Between Fe and H2O up to Megabar Pressures and implications for water storage in the Earth’s mantle and core (2017)
  • Author(s): Liang Yuan, Eiji Ohtani, Daijo Ikuta, Seiji Kamada, Jun Tsuchiya, Hirao Naohisa, Yasuo Ohishi, Akio Suzuki
  • Journal Title: Geophsycical Research Letters Volume: 45(3) Issue: 3 Pages: 1330-1338
  • DOI: 10.1002/2017gl075720
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Diamond formation in the deep lower mantle: a high-pressure reaction of MgCO3 and SiO2 (2017)
  • Author(s): Fumiya Maeda, Eiji Ohtani, Seiji Kamada, Tatsuya Sakamaki, Naohisa Hirao, Yasuo Ohishi
  • Journal Title: Scientific Reports Volume: 7 Issue: 1 Pages: 40602-40602
  • DOI: 10.1038/srep40602
  • Peer Reviewed / Open Access
• [Journal Article] Effect of cation substitution on bridgmanite elasticity: A key to interpret seismic anomalies in the lower mantle (2016)
  • Author(s): Hiroshi Fukui, Akira Yoneda, Akihiko Nakatsuka, Noriyoshi Tsujino, Seiji Kamada, Eiji Ohtani, Anton Shatskiy, Naohisa Hirao, Satoshi Tsutsui, Hiroshi Uchiyama, Alfred Q. R. Baron
  • Journal Title: Scientific Reports Volume: 6 Issue: 1 Pages: 33337-33337
  • DOI: 10.1038/srep33337
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] MORB，FeO，Fe-Si合金中の鉄の電子状態～地球内部への応用～ (2019)
  • Author(s): 鎌田誠司，前田郁也
  • Organizer: 第12回核共鳴散乱研究会
  • Invited
• [Presentation] Electronic and compressional properties of Fe-Si alloys at high pressure (2019)
  • Author(s): Kamada, S., Suzuki, N., Maeda, F., Hirao, N., Masuda, R., Mitsui, T.
  • Organizer: Workshop on properties of planetary interiors
  • Int'l Joint Research / Invited
• [Presentation] Sulfur and carbon isotope fractionation under mantle conditions (2019)
  • Author(s): Maeda, F., Horioka, Y., Kamada, S., Aoyama, S., Ozawa, S., Satish-Kumar, M., Suzuki, A.
  • Organizer: Joint symposium of Misasa 2019 & Core-Mantle Coevolution
  • Int'l Joint Research
• [Presentation] GHz ultrasonic velocity measurement in diamond anvil cell (2019)
  • Author(s): Yoneda, A., Kobayashi, S., Kamada, S.
  • Organizer: Joint symposium of Misasa 2019 & Core-Mantle Coevolution
  • Int'l Joint Research
• [Presentation] 外熱式DACを用いたX線吸収法による高圧下での液体Ga密度測定 (2019)
  • Author(s): 鶴岡椋，寺崎英紀，鎌田誠司，前田郁也，近藤忠，平尾直久
  • Organizer: 日本金属学会2019年春季講演大会
• [Presentation] 高圧下におけるX線吸収法を用いた鉄の密度測定 (2018)
  • Author(s): 鎌田誠司，寺崎英紀，田窪勇作，前田郁也，河口沙織，平尾直久，町田晃彦
  • Organizer: 第59回高圧討論会
• [Presentation] 核マントル反応から探る核中軽元素～硫黄・炭素同位体分別の解明への試み～ (2018)
  • Author(s): 鎌田誠司，前田郁也，堀岡祥生，青山慎之助，M. Satih-Kumar，小澤信，鈴木昭夫，Jay D. Bass
  • Organizer: 新学術領域研究「核－マントルの相互作用と共進化～統合的地球深部科学の創成～」合同班会議
• [Presentation] Cijs of single crystal Pt under high pressure based on IXS and primary pressure scale (2018)
  • Author(s): 鎌田誠司，福井宏之，米田明，前田郁也，筒井智嗣，内山裕士，平尾直久，石川大介，Alfred Q.R. Baron
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Reaction of MgCO3 high-pressure carbonate and metallic iron in the deep lower mantle (2018)
  • Author(s): Maeda, F., Kamada, S., Miyajima, N., Petitgirard, S., Hirao, N., Sakamaki, T., McCammon, C., Frost, D.J., Ohishi, Y., Suzuki, A.
  • Organizer: 56th EHPRG
  • Int'l Joint Research
• [Presentation] Deep Carbon: Diamond formation and carbon speciation in Earth and planetary processes (2018)
  • Author(s): Zedgenizov, D., Kagi, H., Ohtani, E., Tsujimori, I., Komatsu, K., Kamada, S.
  • Organizer: Japan Geoscience Union Meeting 2018
  • Int'l Joint Research
• [Presentation] Compressional velocity of hcp Fe-Si alloy by inelastic X-ray scattering and composition of the inner core (2018)
  • Author(s): Ohtani, E., Sakairi, T., Sakamaki, T., Fukui, H., Kamada, S., Tsutsui, S., Uchiyama, H., Baron, A.Q.R.
  • Organizer: Japan Geoscience Union Meeting 2018
  • Int'l Joint Research
• [Presentation] Chemical reactions between Fe and H2O up to megabar pressures and implications for water storage in the Earth’s mantle and core (2018)
  • Author(s): Yuan, L., Ohtani, E., Ikuta, D., Kamada, S., Tsuchiya, J., Hirao, N., Ohishi, Y., Suzuki, A.
  • Organizer: Japan Geoscience Union Meeting 2018
  • Int'l Joint Research
• [Presentation] GHz-DAC音速法：KClによる予察的測定 (2018)
  • Author(s): 米田明，鎌田誠司
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Phase Relations of MgCO3 High-Pressure Carbonateunder the Lower Mantle Conditions (2017)
  • Author(s): Fumiya Maeda, Seiji Kamada, Tatsuya Sakamaki, Nobuyoshi Miyajima, Naohisa Hirao, Yasuo Ohishi and Akio Suzuki
  • Organizer: 55th EHPRG Meeting
  • Int'l Joint Research
• [Presentation] Mossbauer Study of Basaltic Glass at Lower Mantle Pressures (2017)
  • Author(s): Fumiya Maeda, Seiji Kamada, Eiji Ohtani, Naohisa Hirao, Takaya Mitsui, Ryo Masuda, Masaaki Miyahara, and Catherine McCammon
  • Organizer: IRTG Seminor
  • Int'l Joint Research
• [Presentation] Compressibility of MgCO3 Phase II under the Lowermost Mantle Conditions (2017)
  • Author(s): Fumiya Maeda, Seiji Kamada, Tatsuya Sakamaki, Naohisa Hirao, Yasuo Ohishi and Akio Suzuki
  • Organizer: HPMPS9th
  • Int'l Joint Research
• [Presentation] Partitioning experiments of sulfur using basaltic magma and Fe-FeS melt (2017)
  • Author(s): Yoshiki Horioka, Seiji Kamada, Shin Ozawa, Fumiya Maeda, Madhusoodhan Satish-Kumar, Akio Suzuki
  • Organizer: 新学術領域研究「核－マントル共進化」平成28年度成果報告会
• [Presentation] Sulfur distribution between basaltic magma and Fe-FeS melt (2017)
  • Author(s): Yoshiki Horioka, Seiji Kamada, Shin Ozawa, Fumiya Maeda, Madhusoodhan Satish-Kumar, Akio Suzuki
  • Organizer: JpGU2017
  • Int'l Joint Research
• [Presentation] 玄武岩質マグマとFe-FeS融体間における硫黄の分配挙動と同位体分別に向けて (2017)
  • Author(s): 堀岡祥生, 鎌田誠司, 小澤信, 前田郁也, Madhusoodhan Satish-Kumar, 鈴木昭夫
  • Organizer: 東北大学大学院 理学・生命科学研究科合同シンポジウム2018～新学術領域における学生・若手研究者の連携～
• [Presentation] Light elements in the core based on elemental partitioning experiments between Fe-S melts and silicate magma (2017)
  • Author(s): Keitaro Watanabe, Seiji Kamada, Shin Ozawa, Akio Suzuki, Jay Bass
  • Organizer: JpGU2017
  • Int'l Joint Research
• [Presentation] Single crystal elasticity of gold (Au) up to ~20 GPa: Bulk modulus anomaly below ~5 GPa and implication for a primary pressure scale (2017)
  • Author(s): Akira Yoneda, Hiroshi Fukui, Hitoshi Gomi, Seiji Kamada, Longjian Xie, Naohisa Hirao, Hiroshi Uchiyama, Satoshi Tsutsui, Alfred Baron
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] Composition of the core: Geochemical and mineral physics constraints (2017)
  • Author(s): Eiji Ohtani, Takanori Sakairi, Tatsuya Sakamaki, Seiji Kamada, Ryosuke Tanaka, Hiroshi Fukui, Alfred Q.R. Baron
  • Organizer: JpGU2017
  • Int'l Joint Research
• [Presentation] The sound velocity measurements of FeO at high pressure and temperature: Implications for the low velocity anomaly around the core-mantle boundary (2017)
  • Author(s): Ryosuke Tanaka, Tatsuya Sakamaki, Hiroshi Fukui, Eiji Ohtani, Seiji Kamada, Sei Sato, Satoshi Tsutsui, Hiroshi Uchiyama, Alfred Q.R. Baron, Akio Suzuki
  • Organizer: JpGU2017
  • Int'l Joint Research
• [Presentation] Sound velocity of iron-light element compounds and composition of the inner core (2017)
  • Author(s): Eiji Ohatani, Tatsuya Sakamaki, Seiji Kamada, Daijo Ikuta, Ryosuke Tanaka, Hiroshi Fukui, Alfred Baron
  • Organizer: HPMPS9th
  • Int'l Joint Research
• [Presentation] Sound velocities and elastic constants of single crystal Pt under high pressure (2017)
  • Author(s): Seiji Kamada, Hiroshi Fukui, Akira Yoneda, Fumiya Maeda, Satoshi Tsutsui, Hiroshi Uchiyama, Alfred Baron
  • Organizer: HPMPS9th
  • Int'l Joint Research
• [Presentation] Compressional behavior of δ-(Al,Fe)OOH to lower mantle pressures (2017)
  • Author(s): Itaru Ohira, Seiji Kamada, Jennifer M. Jackson, Wolfgang Sturhahn, Gregory J. Finkelstein, Takaaki Kawazoe, Fumiya Maeda, Naohisa Hirao, Satoshi Nakao, Akio Suzuki, Eiji Ohtani
  • Organizer: HPMPS9th
  • Int'l Joint Research
• [Presentation] X線非弾性散乱による高圧下でのブリッジマナイト結晶弾性率測定２ (2017)
  • Author(s): 福井宏之，米田明，中塚晃彦，鎌田誠司，Xie Longjian，芳野極，Baron Alfred
  • Organizer: 第58回高圧討論会
• [Presentation] 高圧下における白金単結晶の音速と弾性定数，状態方程式 (2017)
  • Author(s): 鎌田誠司，福井宏之，米田明，前田郁也，筒井智嗣，内山裕士，アルフレッド・バロン
  • Organizer: 第58回高圧討論会
• [Presentation] Magnetic and Structural transition of Fe-Si alloy under high pressure (2016)
  • Author(s): Nanami Suzuki, Seiji Kamada, Eiji Ohtani, Fumiya Maeda, Naohisa Hirao, Maki Hamada, Yasuo Ohishi, Ryo Masuda, Takaya Mitsui
  • Organizer: JpGU2016
  • Place of Presentation: 幕張メッセ（千葉県・幕張）
• [Presentation] Sound velocity Fe3S at high pressure and high temperature based on inelastic X-ray scattering (2016)
  • Author(s): Seiji Kamada, Takanori Sakairi, Tatsuya Sakamaki, Eiji OHTANI, Hidenori , Hiroshi FUKUI, A.Q.R. BARON, Akio SUZUKI, Hiroshi UCHIYAMA, Sastoshi TSUTSUI
  • Organizer: JpGU2016
  • Place of Presentation: 幕張メッセ（千葉県・幕張）
  • Int'l Joint Research
• [Presentation] Electrical property and compressional behavior of Fe-Si alloys under high pressure (2016)
  • Author(s): Nanami Suzuki, Seiji Kamada, Fumiya Maeda, Eiji Ohtani, Naohisa Hirao, Yasuo Ohishi, Ryo Masuda, Takaya Mitsui
  • Organizer: GoldSchmidt2016
  • Place of Presentation: 横浜
  • Int'l Joint Research
• [Presentation] Reaction of MgCO3 high pressure polymorph and SiO2; Origin of super-deep diamond (2016)
  • Author(s): Fumiya Maeda, Seiji Kamada, Eiji Ohtani, Tatsuya Sakamaki, Naohisa Hirao, Yasuo Ohishi
  • Organizer: GoldSchmidt2016
  • Place of Presentation: パシフィコ横浜（神奈川県・横浜）
  • Int'l Joint Research
• [Presentation] Formation of Phase H-δAlOOH solid solution in the lower mantle (2016)
  • Author(s): Itaru Ohira, Eiji Ohtani, Seiji Kamada, Naohisa Hirao
  • Organizer: GoldSchmidt2016
  • Place of Presentation: パシフィコ横浜（神奈川県・横浜）
  • Int'l Joint Research
• [Presentation] Sound velocity of Fe3C and carbon in the core (2016)
  • Author(s): Suguru Takahashi, Eiji Ohtani, Tatsuya Sakamaki, Seiji Kamada, Hiroshi Fukui, Alfred Baron
  • Organizer: GoldSchmidt2016
  • Place of Presentation: パシフィコ横浜（神奈川県・横浜）
  • Int'l Joint Research
• [Presentation] 金の結晶弾性の圧力依存性測定：低圧領域での体積弾性率異常と絶対圧力スケールの検討 (2016)
  • Author(s): 米田明，福井宏之，鎌田誠司，謝 龍剣，平尾直久，内山裕士，Alfred Q.R. Baron，筒井智嗣
  • Organizer: 第57回高圧討論会
  • Place of Presentation: 筑波大学大学会館（茨城県・つくば市）
• [Presentation] 高圧下におけるFeOの音速測定 (2016)
  • Author(s): 田中遼介，坂巻竜也，福井宏之，大谷栄治，鎌田誠司，筒井智嗣，内山裕士，Alfred Q. R. Baron，鈴木昭夫
  • Organizer: 第57回高圧討論会
  • Place of Presentation: 筑波大学大学会館（茨城県・つくば市）
• [Presentation] X線非弾性散乱による高圧下でのブリッジマナイト結晶弾性率測定 (2016)
  • Author(s): 福井宏之，米田明，中塚晃彦，鎌田誠司，XIE Longjian，芳野極，Alfred Q. R. Baron
  • Organizer: 第57回高圧討論会
  • Place of Presentation: 筑波大学大学会館（茨城県・つくば市）
• [Presentation] Sound velocity of iron-light element compounds and the chemical structure of the inner core (2016)
  • Author(s): Eiji Ohtani, Tatsuya Sakamaki, Hiroshi Fukui, Ryosuke Tanaka, Yuki Shibazaki, Seiji Kamada, Takanori Sakairi, Suguru Takahashi, Satoshi Tsutsui, Alfred Q. R. Baron
  • Organizer: AGU Fall meeting
  • Place of Presentation: San Francisco (USA)
  • Int'l Joint Research
• [Presentation] Sound velocity and density of FeO at high pressure and temperature (2016)
  • Author(s): Ryosuke Tanaka, Tatsuya Sakamaki, Hiroshi Fukui, Eiji Ohtani, Seiji Kamada, Sei Sato, Satoshi Tsutsui, Hiroshi Uchiyama, Alfred Q. R. Baron, Akio Suzuki
  • Organizer: AGU Fall meeting
  • Place of Presentation: San Francisco (USA)
  • Int'l Joint Research
• [Presentation] Water transport to the lowermost mantle driven by δ-AlOOH-Phase H (MgSiO4H2) solid solution (2016)
  • Author(s): Itaru Ohira, Eiji Ohtani, Seiji Kamada, Naohisa Hirao, Akio Suzuki
  • Organizer: AGU Fall meeting
  • Place of Presentation: San Francisco (USA)
  • Int'l Joint Research
• [Book] 月刊地球 総特集 核-マントルの相互作用と共進化 (2018)
  • Author(s): 鎌田誠司，Madhusoodhan Satish-Kumar
  • Total Pages: 8
  • Publisher: 海洋出版株式会社