Member Since 2015
Takayuki Ishii
Associate professor, Institute for Planetary Materials, Okayama University
AGU Research
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Water in davemaoite assessed from water solubility of perovskite phases in CaSiO3-CaTiO3 systems up to uppermost lower mantle conditions
AGU 2024
study of earth's deep interior | 09 december 2024
Takayuki Ishii, Yingxin Yu
Water is transported into the deep mantle by subducting slabs and can significantly affect chemical and physical properties of mantle minerals. Geoche...
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Temperature Dependence of H2O Solubility in Al‐Free Stishovite
GEOPHYSICAL RESEARCH LETTERS
01 february 2024
Narangoo Purevjav, Hongzhan Fei, Takayuki Ishii, G...
The role of stishovite in transporting water in subducting slabs has been a subject of debate for several decades. Here we investigated stishovite'...
Water solubility of aluminous silicas at lower mantle conditions and their implication for water cycle in the deep mantle
THERMODYNAMIC PROPERTIES OF PLANETARY MATERIALS II ORAL
mineral and rock physics | 11 december 2023
Takayuki Ishii, Giacomo Criniti, Eiji Ohtani, Hong...
Determinations of the water solubility of nominally anhydrous minerals and thermal stability of hydrous minerals is crucial for understanding the stru...
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Equation of State and Spin Crossover of (Al, Fe)‐Phase H
JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH
02 april 2023
Benjamin Strozewski, Johannes Buchen, Wolfgang Stu...
The transport of hydrogen into Earth's deep interior may have an impact on lower mantle dynamics as well as on the seismic signature of subducted m...
A new approach determining an accurate and precise phase transition boundary strictly based on a definition of phase equilibrium by means of in-situ multi-anvil technique
ADVANCED EXPERIMENTAL, COMPUTATIONAL AND ANALYTICAL APPROACHES IN EXPLORING DEEP PLANETARY INTERIORS III ORAL
mineral and rock physics | 15 december 2022
Takayuki Ishii, Artem Chanyshev, Tomoo Katsura
The Clapeyron slope is the slope of a phase boundary in a P-T space. It is considered that the Clapeyron slopes of the mantle constituent minerals con...
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Hydrogen Bonding and Spin State of (Al,Fe)-bearing Phase H at High Pressure
TOWARD AN INTERDISCIPLINARY UNDERSTANDING ON THE STRUCTURE, COMPOSITION, AND DYNAMIC EVOLUTION OF THE LOWER MANTLE III POSTER
study of earth's deep interior | 15 december 2022
Benjamin Strozewski, Johannes Buchen, Wolfgang Stu...
Oxyhydroxide phases in the (Al,Fe)OOHMgSiO2(OH)2 system have been found to coexist with bridgmanite and retain hydrogen in their crystal structures at...
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Recent developments of large-volume multi-anvil technologies for advanced high-pressure-temperature research
ADVANCED EXPERIMENTAL, COMPUTATIONAL AND ANALYTICAL APPROACHES IN EXPLORING DEEP PLANETARY INTERIORS III ORAL
mineral and rock physics | 15 december 2022
Tomoo Katsura, Hongzhan Fei, Takayuki Ishii, Zhaod...
The large-volume multi-anvil press (MAP) is a relatively reliable high pressure (P) - temperature (T) apparatus but has various limitations. We have t...
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A self-protection mechanism by the hydration reduced thermal conductivity of hydrous minerals
TOWARD AN INTERDISCIPLINARY UNDERSTANDING ON THE STRUCTURE, COMPOSITION, AND DYNAMIC EVOLUTION OF THE LOWER MANTLE II ONLINE POSTER DISCUSSION
study of earth's deep interior | 15 december 2022
Wen-Pin Hsieh, Enrico Marzotto, Takayuki Ishii, Le...
Earths deep water cycle triggers significant influences on the physical, chemical, and geodynamical properties in its deep interior. A critical questi...
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