Composition and pressure dependence of lattice thermal conductivity of (Mg,Fe)O solid solutions
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2019-02-01 |
| Journal | Comptes Rendus Géoscience |
| Authors | Akira Hasegawa, Kenji Ohta, Takashi Yagi, Kei Hirose, Y. Okuda |
| Institutions | Life Science Institute, National Institute of Advanced Industrial Science and Technology |
| Citations | 9 |
Abstract
Section titled “Abstract”We measured the lattice thermal conductivities of Fe 0.98 O wüstite and iron-rich (Mg,Fe)O magnesiowüstite using the pulsed light heating thermoreflectance technique with a diamond anvil cell up to 61 GPa at 300 K. We found that the thermal conductivity of wüstite does not show a monotonic increase as a function of pressure, contrary to that of MgO periclase. Rocksalt (B1) to rhombohedral B1 transition is likely to induce an abnormal pressure response in the conductivity of wüstite. Our results also show that magnesiowüstite has a lower conductivity than that of MgO and FeO endmembers due to a strong iron impurity effect, which is well reproduced by a model considering phonon-impurity scattering in a binary solid solution.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
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