M
Motohiko Murakami
Researcher at ETH Zurich
Publications - 56
Citations - 3506
Motohiko Murakami is an academic researcher from ETH Zurich. The author has contributed to research in topics: Mantle (geology) & Post-perovskite. The author has an hindex of 19, co-authored 49 publications receiving 3181 citations. Previous affiliations of Motohiko Murakami include Tohoku University & Tokyo Institute of Technology.
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Post-Perovskite Phase Transition in MgSiO3
TL;DR: Results demonstrate that MgSiO3 perovskite transforms to a new high-pressure form with stacked SiO6-octahedral sheet structure above 125 gigapascals and 2500 kelvin (2700-kilometer depth near the base of the mantle) with an increase in density of 1.0 to 1.2%.
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The elasticity of the MgSiO3 post-perovskite phase in the Earth's lowermost mantle.
TL;DR: It is found that the post-perovskite phase becomes the stable phase above 98 GPa, and may be responsible for the observed seismic discontinuity and anisotropy in the lowermost mantle.
Post-Perovskite Phase Transition
TL;DR: In situ x-ray diffraction measurements of MgSiO 3 were performed at high pressure and temperature similar to the conditions at Earth's core-mantle boundary as mentioned in this paper.
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A perovskitic lower mantle inferred from high-pressure, high-temperature sound velocity data
TL;DR: The mineralogical model that provides the best fit to a global seismic velocity profile indicates that perovskite constitutes more than 93 per cent by volume of the lower mantle, which is a much higher proportion than that predicted by the conventional peridotitic mantle model.
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Post‐perovskite phase transition and mineral chemistry in the pyrolitic lowermost mantle
TL;DR: In this paper, phase relations of a natural mantle composition were determined up to 126 GPa and 2450 K by in-situ x-ray diffraction measurements in a laser-heated diamond-anvil cell (LHDAC).