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

doi:10.1515/zna-1995-0914

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 journal › Article › peer-review

9 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	876-880
Number of pages	5
Journal	Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences
Volume	50
Issue number	9
DOIs	https://doi.org/10.1515/zna-1995-0914
Publication status	Published - Sep 1 1995

Keywords

Crystal structure
EXAFS
Phase transition
X-ray diffraction

ASJC Scopus subject areas

Mathematical Physics
Physics and Astronomy(all)
Physical and Theoretical Chemistry

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EXAFS Study on the Phase Transition (Phase α′ - δ ) in CH₃NH₃I. / Ishida, Hiroyuki; Maeda, Hironobu; Hirano, Akiko; Fujimoto, Tamotsu; Kubozono, Yoshihiro; Kashino, Setsuo; Emura, Shuichi.

In: Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences, Vol. 50, No. 9, 01.09.1995, p. 876-880.

Research output: Contribution to journal › Article › peer-review

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abstract = "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.",

keywords = "Crystal structure, EXAFS, Phase transition, X-ray diffraction",

author = "Hiroyuki Ishida and Hironobu Maeda and Akiko Hirano and Tamotsu Fujimoto and Yoshihiro Kubozono and Setsuo Kashino and Shuichi Emura",

note = "Funding Information: The authors are grateful to Dr. S. Kishimoto and Dr. T. Usami of the Photon Factory (KEK, Tsukuba) for their kind help in carrying out the measurements of EXAFS spectra. We wish to thank for the use of X-ray diffractometers (Rigaku AFC-5R) in the X-ray Laboratory of Okayama University. This work has been performed under a proposal of the Photon Factory Program Advisory Committee (No. 93G-189), and supported by a Grant-in-Aid for Scientific Research (No. 06640658) from the Ministry of Education, Science and Culture, Japan.",

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AU - Fujimoto, Tamotsu

AU - Kubozono, Yoshihiro

AU - Kashino, Setsuo

AU - Emura, Shuichi

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