Quasielastic neutron scattering of brucite to analyse hydrogen transport on the atomic scale

Takuo Okuchi, Naotaka Tomioka, Narangoo Purevjav, Kaoru Shibata

Research output: Contribution to journalArticle

Abstract

It is demonstrated that quasielastic neutron scattering is a novel and effective method to analyse atomic scale hydrogen transport processes occurring within a mineral crystal lattice. The method was previously characterized as sensitive for analysing the transport frequency and distance of highly diffusive hydrogen atoms or water molecules in condensed matter. Here are shown the results of its application to analyse the transport of much slower hydrogen atoms which are bonded into a crystal lattice as hydroxyls. Two types of hydrogen transport process were observed in brucite, Mg(OH)2: a jump within a single two-dimensional layer of the hydrogen lattice and a jump into the next nearest layer of it. These transport processes observed within the prototypical structure of brucite have direct implications for hydrogen transport phenomena occurring within various types of oxides and minerals having layered structures.

Original languageEnglish
JournalJournal of Applied Crystallography
DOIs
Publication statusAccepted/In press - Jan 1 2018

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Keywords

  • brucite
  • hydrogen transport
  • hydrous minerals
  • QENS
  • quasielastic neutron scattering
  • transmission electron microscopy

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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