Ferroelectric phase transitions in alkylammonium halogenoantimonates (III)
- 1 February 1988
- journal article
- research article
- Published by Taylor & Francis in Ferroelectrics
- Vol. 78 (1) , 69-78
- https://doi.org/10.1080/00150198808215890
Abstract
A number of crystals composed of nonahalo-genodiantimonate anion and alkylammonium cations of general formula [NH4-n(CH3)n]3Sb2X9 (X=Cl, Br) have been grown which exhibit dielectric anomalies. Ferroelectric phase transitions were found in [(cH3)2NH2]3Sb2Cl9, [(CH3)3NH]3Sb2Cl9 and [(CH3)2NH2]3Sb2Br9. X-ray diffraction, dielectric, NMR and IR studies show that the order-disorder phase transitions are related to a motion of alkylammonium cations.Keywords
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