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Pajzderska A, Wasicki J, Czarnecki P, et al. Discovery of an intermediate phase in bis-thiourea pyridinium chloride inclusion compound. J Chem Phys. 2009;130(4):044503doi: 10.1063/1.3065983.
Pajzderska, A., Wasicki, J., Czarnecki, P., Toupet, L., & Collet, E. (2009). Discovery of an intermediate phase in bis-thiourea pyridinium chloride inclusion compound. The Journal of chemical physics, 130(4), 044503. https://doi.org/10.1063/1.3065983
Pajzderska, A, et al. "Discovery of an intermediate phase in bis-thiourea pyridinium chloride inclusion compound." The Journal of chemical physics vol. 130,4 (2009): 044503. doi: https://doi.org/10.1063/1.3065983
Pajzderska A, Wasicki J, Czarnecki P, Toupet L, Collet E. Discovery of an intermediate phase in bis-thiourea pyridinium chloride inclusion compound. J Chem Phys. 2009 Jan 28;130(4):044503. doi: 10.1063/1.3065983. PMID: 19191394.
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J Chem Phys. 2009 Jan 28;130(4):044503. doi: 10.1063/1.3065983.

Discovery of an intermediate phase in bis-thiourea pyridinium chloride inclusion compound.

The Journal of chemical physics

A Pajzderska, J Wasicki, P Czarnecki, L Toupet, E Collet

Affiliations

  1. Faculty of Physics, A. Mickiewicz University, ul. Umultowska 85, 61-614 Pozna?, Poland. [email protected]

PMID: 19191394 DOI: 10.1063/1.3065983

Abstract

This paper reports the occurrence of a new phase for bis-thiourea pyridinium chloride inclusion compound, which is intermediate to the high- and low-temperature ones already reported. The structure of the intermediate phase was determined by the x-ray diffraction and the following sequence of space groups was obtained: Cmcm-->(237 K)Cmc2(1)-->(206 K)Pbca. The triplication of the lattice a parameter in the intermediate phase was observed. Detailed investigations of its phase transitions were performed by differential scanning calorimetry, x-ray diffraction, and dielectric spectroscopy methods. The phase transition at T(1)=237 K is continuous while at T(2)=206 K is discontinuous. Both phase transitions have been classified as of order-disorder type. The high- and low-temperature phases are nonpolar in contrast to the intermediate phase, for which we could not found ferroelectric ordering.

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