論文

査読有り
2018年

Thermal equation of state of MgSiO4H2 phase H determined by in situ X-ray diffraction and a multianvil apparatus

Physics and Chemistry of Minerals
  • Masayuki Nishi
  • ,
  • Jun Tsuchiya
  • ,
  • Takeshi Arimoto
  • ,
  • Sho Kakizawa
  • ,
  • Takehiro Kunimoto
  • ,
  • Yoshinori Tange
  • ,
  • Yuji Higo
  • ,
  • Tetsuo Irifune

開始ページ
1
終了ページ
7
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1007/s00269-018-0980-z

Phase H (MgSiO4H2) is the high-pressure form of dense hydrous silicate that could deliver surface water into the lower mantle. In this study, we determined the thermal equations of the state of phase H using in situ X-ray diffraction measurements, under conditions ranging from 34 to 62 GPa and 300 and 1300 K, using a multianvil apparatus. Analysis of the data, based on the Mie–Grüneisen–Debye model using third-order Burch–Murnaghan equations at a reference pressure of 35 GPa, yielded the following results Vref = 49.61 ± 0.01 Å3, Kref = 344.6±4.1 GPa, K′ref  = 3.05 ± 0.32, θref = 974 ± 146 K, γref = 1.8 ± 0.1, and q = 1.79 ± 0.55. The compressibility of phase H observed in this study agrees well with that derived from theoretical calculations in pressure regions where hydrogen bond symmetrization is predicted. It was also found that the volume and compressibility of phase H and δ-AlOOH were similar.

リンク情報
DOI
https://doi.org/10.1007/s00269-018-0980-z
Scopus Url
http://www.scopus.com/inward/record.url?eid=2-s2.0-85048298692&partnerID=MN8TOARS
ID情報
  • DOI : 10.1007/s00269-018-0980-z
  • ORCIDのPut Code : 49519583
  • SCOPUS ID : 85048298692

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