In situ X–ray diffraction studies of hydrous aluminosilicate at high pressure and temperature

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Author(s)

    • ABE Ryota
    • Department of Earth Science, Graduate School of Science, Tohoku University
    • SHIBAZAKI Yuki
    • Frontier Research Institute for Interdisciplinary Sciences, Tohoku University
    • OZAWA Shin
    • Department of Earth Science, Graduate School of Science, Tohoku University
    • OHIRA Itaru
    • Department of Earth Science, Graduate School of Science, Tohoku University
    • TOBE Hiromu
    • Department of Earth Science, Graduate School of Science, Tohoku University
    • SUZUKI Akio
    • Department of Earth Science, Graduate School of Science, Tohoku University

Abstract

<p>In situ X–ray diffraction studies of the phase relation of Al<sub>2</sub>SiO<sub>4</sub>(OH)<sub>2</sub> were conducted within a pressure range of 19.7–32.2 GPa and a temperature range of 800–1600 °C. We observed the coexistence of δ–AlOOH and stishovite at 31.0 GPa and 1500 °C and the formation of phase Egg together with corundum at 30.6 GPa and 1600 °C. Our results indicate that phase Egg is stable at least up to 31 GPa and 1600 °C and should be the important water carrier after the avalanche of the stagnant slab to a depth of approximately 900 km in the lower mantle.</p>

Journal

  • Journal of Mineralogical and Petrological Sciences

    Journal of Mineralogical and Petrological Sciences 113(2), 106-111, 2018

    Japan Association of Mineralogical Sciences

Codes

  • NII Article ID (NAID)
    130006733782
  • Text Lang
    ENG
  • ISSN
    1345-6296
  • Data Source
    J-STAGE 
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