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

doi:10.2465/jmps.170714

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 journal › Letter › peer-review

8 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 language	English
Pages (from-to)	106-111
Number of pages	6
Journal	Journal of Mineralogical and Petrological Sciences
Volume	113
Issue number	2
DOIs	https://doi.org/10.2465/jmps.170714
Publication status	Published - 2018

Keywords

Hydrous aluminosilicate
Lower mantle
Subducting slab
Synchrotron X-ray diffraction

ASJC Scopus subject areas

Geophysics
Geology

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10.2465/jmps.170714

Cite this

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title = "In situ X-ray diffraction studies of hydrous aluminosilicate at high pressure and temperature",

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.",

keywords = "Hydrous aluminosilicate, Lower mantle, Subducting slab, Synchrotron X-ray diffraction",

author = "Ryota Abe and Yuki Shibazaki and Shin Ozawa and Itaru Ohira and Hiromu Tobe and Akio Suzuki",

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year = "2018",

doi = "10.2465/jmps.170714",

language = "English",

volume = "113",

pages = "106--111",

journal = "Journal of Mineralogical and Petrological Sciences",

issn = "1345-6296",

publisher = "Tohoku University",

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TY - JOUR

T1 - In situ X-ray diffraction studies of hydrous aluminosilicate at high pressure and temperature

AU - Abe, Ryota

AU - Shibazaki, Yuki

AU - Ozawa, Shin

AU - Ohira, Itaru

AU - Tobe, Hiromu

AU - Suzuki, Akio

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

KW - Hydrous aluminosilicate

KW - Lower mantle

KW - Subducting slab

KW - Synchrotron X-ray diffraction

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DO - 10.2465/jmps.170714

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JO - Journal of Mineralogical and Petrological Sciences

JF - Journal of Mineralogical and Petrological Sciences

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

Abstract

Keywords

ASJC Scopus subject areas

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