Formation process of perovskite-type hydride LiNiH3: In situ synchrotron radiation X-ray diffraction study

Ryutaro Sato, Hiroyuki Saitoh, Naruki Endo, Shigeyuki Takagi, Motoaki Matsuo, Katsutoshi Aoki, Shin Ichi Orimo

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16 Citations (Scopus)


The formation process of perovskite-type hydride LiNiH3 was investigated using 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 NiHx, formation of LiyNi1-yH solid solution, and conversion to perovskite-type hydride LiNiH3. 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.

Original languageEnglish
Article number091901
JournalApplied Physics Letters
Issue number9
Publication statusPublished - 2013 Mar 4

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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