Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1408169 | Journal of Molecular Structure | 2007 | 6 Pages |
Abstract
[C3H5N2]6[Bi4Cl18] crystallizes at room temperature in the monoclinic space group; C2/m. It undergoes two solid-solid phase transitions of first-order type at 221/218Â K (heating-cooling) from phase I to II and at 195/145Â K from phase II to III. The dielectric relaxation process was found to appear in a kilohertz frequency region over the phase III with the activation energy c.a. 14Â kJ/mol. A polydispersive character of the dielectric dispersion indicates a presence of complex molecular motions of dipolar groups in the crystal. The mechanism of the phase transitions in [C3H5N2]6[Bi4Cl18] is proposed.
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Authors
A. Piecha, R. Jakubas, A. Pietraszko,