Publication List
2024
❄️ Hydrogen bond symmetrisation in D2O ice observed by neutron diffraction
Kazuki Komatsu*, Takanori Hattori, Stefan Klotz*, Shinichi Machida, Keishiro Yamashita, Hayate Ito, , Tetsuo Irifune, Toru Shinmei, Asami Sano-Furukawa, and Hiroyuki Kagi.
Nature Communications (2024) 15 1 5100
https://www.nature.com/articles/s41467-024-48932-8
💎 High-pressure and high-temperature Raman spectroscopic study of zircon as a pressure scale in hydrothermal DACs
Naoko Takahashi*, , and Hiroyuki Kagi.
Journal of Raman Spectroscopy (2024) 55 6 706
https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/10.1002/jrs.6663
A collaboration with Naoko, we expanded the p-T region where the zircon Raman pressure scale is applicable. I mainly contributed to synchrotron x-ray diffraction measurements and analysis. Our x-ray diffraction results give a firm support to the previous work by Schmidt et al., with consistency to the standard primary pressure scale of gold.
2023
❄️ Slightly Hydrogen-Ordered State of Ice IV Evidenced by In-Situ Neutron Diffraction
, Kazuki Komatsu, Hayate Ito, Shinichi Machida, Takanori Hattori, and Hiroyuki Kagi.
The Journal of Physical Chemistry Letters (2023) 14 10664
https://doi.org/10.1021/acs.jpclett.3c02563
We reported crystallographic evidence for the hydrogen ordering in ice IV by neutron diffraction. It shows discontinuous behaviour at 120 K and Rietveld analysis at the low-T side suggests it is a very weak hydrogen ordering structural transition.
We refined for the first time the hydrogen-atom position in ice VII (X) up to 106 GPa by in-situ powder neutron diffraction using nano-polycrystalline diamond anvil cells. I participated in experiments and discussion.