Crystal structure of LiH2PO4 studied by single-crystal neutron diffraction

In Hwan Oh, Kwang Sei Lee, Martin Meven, Gernot Heger, Cheol Eui Lee

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Abstract

Structure of a LiH2PO4 (LDP) single crystal has been studied at room temperature and at 100K by means of neutron diffraction. The LiO4 tetrahedra in LDP are linked by vertices forming chains along the a-axis, and a three-dimensional network is formed by PO4 groups connected by two different hydrogen bonds. The Li+ ions in this structure were found to be quite immobile in spite of their very light mass; The very high proton conductivity in the system may have directly to do with the relatively weak hydrogen bonds and the relatively long interoxygen distances facilitating reorientation of the proton acceptor complexes, rather than with the Li+ ionic motions.

Original languageEnglish
Article number074606
JournalJournal of the Physical Society of Japan
Volume79
Issue number7
DOIs
Publication statusPublished - 2010 Jul 1

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Keywords

  • Crystal structure
  • Hydrogen bond
  • LiHPO (LDP)
  • Neutron diffraction
  • Proton conductor

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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