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

Ryota Abe, Yuki Shibazaki, Shin Ozawa, Itaru Ohira, Hiromu Tobe, Akio Suzuki

Research output: Contribution to journalLetterpeer-review

3 Citations (Scopus)

Abstract

In situ X-ray diffraction studies of the phase relation of Al2SiO4(OH)2 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.

Original languageEnglish
Pages (from-to)106-111
Number of pages6
JournalJournal of Mineralogical and Petrological Sciences
Volume113
Issue number2
DOIs
Publication statusPublished - 2018

Keywords

  • Hydrous aluminosilicate
  • Lower mantle
  • Subducting slab
  • Synchrotron X-ray diffraction

ASJC Scopus subject areas

  • Geophysics
  • Geology

Fingerprint Dive into the research topics of 'In situ X-ray diffraction studies of hydrous aluminosilicate at high pressure and temperature'. Together they form a unique fingerprint.

Cite this