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Li$$_{4}$$FeH$$_{6}$$; Iron-containing complex hydride with high gravimetric hydrogen density

Saito, Hiroyuki; Takagi, Shigeyuki*; Matsuo, Motoaki*; Iijima, Yuki*; Endo, Naruki*; Aoki, Katsutoshi*; Orimo, Shinichi*

Li$$_{4}$$FeH$$_{6}$$, which has the highest gravimetric hydrogen density of iron-containing complex hydrides reported so far, is synthesized by hydrogenation of a powder mixture of iron and LiH above 6.1 GPa at 900 $$^{circ}$$C. ${it In situ}$ synchrotron radiation X-ray diffraction measurements reveal that while kinetics require high temperature and thus high pressure for the synthesis, Li$$_{4}$$FeH$$_{6}$$ is expected to be thermodynamically stable slightly below room temperature at ambient pressure; further synthetic studies to suppress the kinetic effects may enable us to synthesize Li$$_{4}$$FeH$$_{6}$$ at moderate pressures. Li$$_{4}$$FeH$$_{6}$$ can be recovered at ambient conditions where Li$$_{4}$$FeH$$_{6}$$ is metastable.

Language

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English

Journal

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APL Materials (Internet)

Volume

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2

Number

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7

Pages

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p.076103_1 - 076103_7

Publication Year/Month

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2014/07

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Held date

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Location (city)

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.1063/1.4886219

DOI for research data

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Keywords

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high pressure and high temperature; in situ synchrotron radiation X-ray diffraction; hydride; iron

Research Facility

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SPring-8(大型放射光施設)

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:70.44

Category:Nanoscience & Nanotechnology

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