The structure of manganese dioxide and position of proton studied by neutron diffraction with isotopic substitution

Cédric Pitteloud, Miki Nagao, Keiji Itoh, Ryoji Kanno

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The position of proton inside manganese dioxide, γ-MnO2, was studied by the total neutron-scattering technique using H/D isotopic substitution. The first-order difference was obtained by subtracting the results for the two different isotopic compositions and obtaining the weighted sum of partial structure factors and radial distribution functions related to the structure around hydrogens. The deuterium-substituted γ-MnO2 was prepared by de-intercalation of the proton via an oxidative treatment prior to re-intercalation with deuterium. The proton occupied two different positions with the H-O length of 1.0 and 1.9 Å, which corresponds to the 'Ruetschi' and 'Coleman' protons, respectively. The former protons situated in the Mn4+ vacant site and the latter in the tunnel centered in an oxygen octahedron. The isotopic substitution technique and the structure around protons are discussed in details.

Original languageEnglish
Pages (from-to)467-472
Number of pages6
JournalJournal of Solid State Chemistry
Volume181
Issue number3
DOIs
Publication statusPublished - Mar 1 2008
Externally publishedYes

Keywords

  • Isotopic substitution
  • Neutron scattering
  • Proton
  • γ-MnO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'The structure of manganese dioxide and position of proton studied by neutron diffraction with isotopic substitution'. Together they form a unique fingerprint.

  • Cite this