Partially Disordered Structure of Ca2Sr(C2H5CO2)6 in the Ferroelectric Phase

Autor:	Kazuyuki Itoh, Naoyuki Mishima, Eiji Nakamura
Rok vydání:	1982
Předmět:	chemistry.chemical_classification Materials science Condensed matter physics General Physics and Astronomy Crystal structure Ferroelectricity Ion Crystal symbols.namesake chemistry Phase (matter) Formula unit symbols Propionate van der Waals force
Zdroj:	Journal of the Physical Society of Japan. 51:3958-3965
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.51.3958
Popis:	The crystal structure of Ca 2 Sr(C 2 H 5 CO 2 ) 6 in the ferroelectric phase was determined at -40°C by X-ray reflection data from a monodomain crystal. The least-squares calculation was converged with the R -factor of 0.044. Among the six independent propionate ions in a formula unit, four ones which are disordered perfectly in the paraelectric phase are in partially disordered states with two equilibrium atomic positions. Correlation between the positions of methyl groups in the disordered propionate ions is discussed on the basis of the van der Waals version.
Databáze:	OpenAIRE
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