High-Pressure Synthesis of Manganese Oxyhydride with Partial Anion Order

Cedric Tassel, Yoshinori Goto, Daichi Watabe, Ya Tang, Honcheng Lu, Yoshinori Kuno, Fumitaka Takeiri, Takafumi Yamamoto, Craig M. Brown, James Hester, Yoji Kobayashi, Hiroshi Kageyama

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The high-pressure synthesis of a manganese oxyhydride LaSrMnO3.3H0.7is reported. Neutron and X-ray Rietveld analyses showed that this compound adopts the K2NiF4structure with hydride ions positioned exclusively at the equatorial site. This result makes a striking contrast to topochemical reductions of LaSrMnO4that result in only oxygen-deficient phases down to LaSrMnO3.5. This suggests that high H2pressure plays a key role in stabilizing the oxyhydride phase, offering an opportunity to synthesize other transition-metal oxyhydrides. Magnetic susceptibility revealed a spin-glass transition at 24 K that is due to competing ferromagnetic (Mn2+–Mn3+) and antiferromagnetic (Mn2+–Mn2, Mn3+–Mn3+) interactions.
Original languageEnglish (US)
Pages (from-to)9667-9670
Number of pages4
JournalAngewandte Chemie - International Edition
Volume55
Issue number33
DOIs
StatePublished - Aug 8 2016
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

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