Repozytorium
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Kolekcje
Inne
Phase transition and structure of (C3N2H5)2SbF5 single crystal.
Autorzy
Rok wydania
2015
Czasopismo
Journal of Physics and Chemistry of Solids
Numer woluminu
87
Strony
233-237
DOI
10.1016/j.jpcs.2015.08.014
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
New crystal of the formula (C3N2H5)2SbF5 was obtained and characterized with DSC, DTA, TGA, structural and dielectric studies. DSC and dielectric studies revealed a structural phase transition of the first order at 216 K on cooling and 220 K on heating. The entropy of the transition ΔS equal to 11.5 J/mol·K gives evidence that the phase transition is order-disorder type. X-ray studies showed that transition undergoes from orthorhombic phase I with a space group of Pmmn to monoclinic phase II with a space group P21/m. The phase transition is proposed to be ferroelastic type. The molecular mechanism of the phase transition is related to ordering of imidazolium cations in phase II that are disordered in phase I.
Słowa kluczowe
phase transition, crystal structure, Electric permittivity
Adres publiczny
http://dx.doi.org/10.1016/j.jpcs.2015.08.014
Strona internetowa wydawcy
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