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Phase transitions in alkylammonium halogenoantimonates and bismuthates.
Autorzy
Rok wydania
1990
Czasopismo
Numer woluminu
20
Strony
163-193
DOI
10.1080/01411599008206873
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
A review of the results of studies on the structure, phase transitions and physical properties of alkylammonium halogenoantimonates (III) and bismuthates (III) is presented. The crystals of these compounds are characterized by a variety of anionic structures and show a number of phase transitions including those to polar phases. We concentrate here mainly on dielectric and pyroelectric properties, spontaneous polarization and DSC studies. The mechanism of the phase transitions is discussed based on the results of X-ray, dielectric relaxation, PMR, IR and R spectra studies gathered so far. A particular role is played by a reorientational motion of the alkylammonium cations.
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