EXAFS Study on the Phase Transition (Phase α′ - δ ) in CH3NH3I

Hiroyuki Ishida, Hironobu Maeda, Akiko Hirano, Tamotsu Fujimoto, Yoshihiro Kubozono, Setsuo Kashino, Shuichi Emura

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The local structure of CH3NH3I around the I-ion in Phase a ' and 5 was studied by iodine K-edge EXAFS. The crystal structure in Phase α ' was redetermined by single crystal X-ray diffraction. The Debye-Waller factor σ(2)derived from EXAFS spectra shows an anomalous behavior around the order-disorder transition temperature from Phase 5 to α'. The phase transition has been interpreted as the disordering process which involves not only the H atoms but also the C atoms in the cation.

Original languageEnglish
Pages (from-to)876-880
Number of pages5
JournalZeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Issue number9
Publication statusPublished - Sept 1 1995


  • Crystal structure
  • Phase transition
  • X-ray diffraction

ASJC Scopus subject areas

  • Mathematical Physics
  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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