Phase relations of the Earth's core material determined in an internally-heated diamond anvil cell

• Project/Area Number: 20740306
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: KOMABAYASHI Tetsuya Tokyo Institute of Technology, 大学院・理工学研究科, 助教 (20444119)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2009: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 高圧 / 鉄 / 核 / ダイアモンドアンビル / 熱力学 / 抵抗加熱 / ダイアモンドアンビルセル

Research Abstract

We conducted in-situ X-ray diffraction experiments on pure iron in a newly developed internally-resistive-heated diamond anvil cell. We determined the P-T location of the HCP-FCC phase transition boundary and obtained unit-cell volume data of the phases. From these experimental data, we have constructed a self-consistent thermodynamic database for iron which is applicable to conditions of the center of the Earth.

Research Products

• [Journal Article] Internally consistent thermodynamic database for iron to the Earth's core conditions. (2010)
  • Author(s): Komabayashi, T., Fei, Y
  • Journal Title: Journal of Geophysical Research 115
  • Peer Reviewed
• [Journal Article] Internally consistent thermodynamic database for iron to the Earth's core conditions (2010)
  • Author(s): Komabayashi, T., Fei, Y.
  • Journal Title: Journal of Geophysical Research(Solid Earth) 115
  • Peer Reviewed
• [Journal Article] In-situ X-ray diffraction measurements of theγ-εtransition boundary of iron in an internally-heated diamond anvil cell. (2009)
  • Author(s): Komabayashi, T., Fei, Y., Meng, Y. Prakapenka, V.
  • Journal Title: Earth and Planetary Science Letters 282 Pages: 252-257
  • Peer Reviewed
• [Journal Article] In-situ X-ray diffraction measurements of the γ-ε transition boundary of iron in an internally-heated diamond anvil cell
  • Author(s): Komabayashi, T., et al.
  • Journal Title: Earth and Planetary Science Letters (印刷中)
  • Peer Reviewed
• [Presentation] Phase relations and density of iron at the Earth's core conditions American Geophysical Union (2009)
  • Author(s): Komabayashi, T., Fei, Y
  • Organizer: 2009 Fall Meeting
  • Place of Presentation: San Francisco, California
  • Year and Date: 2009-12-17
• [Presentation] Phase relations and density of iron at the Earth's core conditions (2009)
  • Author(s): Komabayashi, T., Fei, Y.
  • Organizer: 2009 AGU Fall meeting
  • Place of Presentation: Moscone convention center, CA, USA
  • Year and Date: 2009-12-17
• [Presentation] HCP vs. FCC vs. BCC phases in the Earth' s inner core. American Geophysical Union (2008)
  • Author(s): Komabayashi, T., Fei, Y.
  • Organizer: 2008 Fall Meeting
  • Place of Presentation: San Francisco, California
  • Year and Date: 2008-12-18
• [Presentation] Stable iron phase in the Earth's inner core and its melting temperature. International workshop (2008)
  • Author(s): Komabayashi, T., Fei, Y.
  • Organizer: Transport properties in the lower mantle
  • Place of Presentation: Nikko, Japan
  • Year and Date: 2008-10-23