Rotational Displacement of IO4Tetrahedron in the Phase II of Pyridinium Periodate

Autor:	Hironobu Kasano, Tatsuki Miyoshi, Hiroyuki Mashiyama
Rok vydání:	2007
Předmět:	Materials science Hydrogen bond Periodate Condensed Matter Physics Rotation Ferroelectricity Electronic Optical and Magnetic Materials chemistry.chemical_compound Crystallography chemistry Phase (matter) Tetrahedron Pyridinium Structural unit
Zdroj:	Ferroelectrics. 346:130-135
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150190601182006
Popis:	In order to investigate the displacement of the IO 4 tetrahedron in the ferroelectric phase II of pyridinium periodate in detail, we performed X-ray structural analysis at 33 temperatures with the use of the estimated site occupancies of carbon and nitrogen atoms. We confirmed the continuous increase of the rotation angle of the IO 4 tetrahedron about the a-axis with decreasing temperature in the phase II. This indicates that the IO 4 tetrahedron acts as the displacive structural unit at the transition from phase I to phase II. It is found that the rotation of the IO 4 tetrahedron is correlated with the reorientation of the pyridinium cation through the N-H─ O type hydrogen bond.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e7e68561cc37259669e0413f30c5fedc https://doi.org/10.1080/00150190601182006 Zobrazit plný text záznamu