Phase Transition of a StructureII Cubic Clathrate Hydrate to a Tetragonal Form

Satoshi Takeya, Hiroshi Fujihisa, Hiroshi Yamawaki, Yoshito Gotoh, Ryo Ohmura, Saman Alavi, John A. Ripmeester

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The crystal structure and phase transition of cubic structureII (sII) binary clathrate hydrates of methane (CH4) and propanol are reported from powder X-ray diffraction measurements. The deformation of host water cages at the cubic-tetragonal phase transition of 2-propanol+CH4 hydrate, but not 1-propanol+CH4 hydrate, was observed below about 110K. It is shown that the deformation of the host water cages of 2-propanol+CH4 hydrate can be explained by the restriction of the motion of 2-propanol within the 51264 host water cages. This result provides a low-temperature structure due to a temperature-induced symmetry-lowering transition of clathrate hydrate. This is the first example of a cubic structure of the common clathrate hydrate families at a fixed composition.

Original languageEnglish
JournalAngewandte Chemie - International Edition
DOIs
Publication statusAccepted/In press - 2016

Fingerprint

Hydrates
Propanol
Phase transitions
2-Propanol
1-Propanol
Water
Methane
X ray powder diffraction
Crystal structure
Temperature
Chemical analysis

Keywords

  • Clathrates
  • Gas hydrates
  • Inclusion compounds
  • Phase transitions
  • Powder X-ray diffraction

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

Cite this

Phase Transition of a StructureII Cubic Clathrate Hydrate to a Tetragonal Form. / Takeya, Satoshi; Fujihisa, Hiroshi; Yamawaki, Hiroshi; Gotoh, Yoshito; Ohmura, Ryo; Alavi, Saman; Ripmeester, John A.

In: Angewandte Chemie - International Edition, 2016.

Research output: Contribution to journalArticle

Takeya, Satoshi ; Fujihisa, Hiroshi ; Yamawaki, Hiroshi ; Gotoh, Yoshito ; Ohmura, Ryo ; Alavi, Saman ; Ripmeester, John A. / Phase Transition of a StructureII Cubic Clathrate Hydrate to a Tetragonal Form. In: Angewandte Chemie - International Edition. 2016.
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