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Title
Japanese: 
English:Measurements of lattice thermal conductivity of MgO to core-mantle boundary pressures 
Author
Japanese: 今田沙織, 太田健二, 八木貴志, 廣瀬敬, Yoshida Hideto, 永原 裕子.  
English: Saori Imada, Kenji Ohta, Takashi Yagi, Kei HIROSE, Hideto Yoshida, Hiroko Nagahara.  
Language English 
Journal/Book name
Japanese: 
English:Geophysical Research Letters 
Volume, Number, Page vol. 41       
Published date June 26, 2014 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.1002/2014GL060423
Abstract The pressure response of lattice thermal conduction in MgO periclase has been a matter of interest for many decades to estimate the thermal conductivity prole of the lower mantle. Using the pulsed light heating thermoreectance technique, we measured the lattice thermal diffusivity of MgO at pressures up to 137 GPa at 300 K to determine its lattice thermal conductivity under deep lower mantle conditions. Considering the temperature effect estimated by previous high-temperature measurements, we calculated the lattice part of the thermal conductivity of MgO to be 17.9 ± 1.1 W/m/K at 135 GPa and 3600 K. Additionally, we observed that the lattice conductivity of MgO has little dependence on its grain size under core-mantle boundary conditions.

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