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Formation process of perovskite-type hydride LiNiH$$_{3}$$; ${it In situ}$ synchrotron radiation X-ray diffraction study

ペロフスカイト型水素化物LiNiH$$_{3}$$の生成; 放射光X線回折によるその場観察

佐藤 龍太郎*; 齋藤 寛之; 遠藤 成輝; 高木 成幸*; 松尾 元彰*; 青木 勝敏; 折茂 慎一*

Sato, Ryutaro*; Saito, Hiroyuki; Endo, Naruki; Takagi, Shigeyuki*; Matsuo, Motoaki*; Aoki, Katsutoshi; Orimo, Shinichi*

The formation process of perovskite-type hydride LiNiH$$_{3}$$ was investigated using ${it in situ}$ synchrotron X-ray diffraction measurements. A mixture of LiH and Ni was hydrogenated at 873 K and 3 GPa, and the structural changes associated with hydrogenation were observed. Time resolved diffraction profiles showed a three-step reaction: hydrogenation of Ni to NiH$$_{x}$$, formation of Li$$_{y}$$Ni$$_{1-y}$$H solid solution, and conversion to perovskite-type hydride LiNiH$$_{3}$$. The solid solution, which has never been reported, plays the role of the precursor in the perovskite formation and its presence is apparently critical for synthesizing perovskite-type hydrides.

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パーセンタイル:41.64

分野:Physics, Applied

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