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Calorimetric study of the phase transitions in tris(dimethylammonium)nonabromodiantimonate(III) and tris(dimethylammonium)nonachlorodiantimonate(III).
Autorzy
Rok wydania
1992
Czasopismo
Numer woluminu
125
Strony
39-44
DOI
10.1080/00150199208017041
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Temperature dependences of the specific heat of (NH2(CH3)2]3Sb2cl9 (DMACA) and (NH2(CH3)2)3Sb2Br9 (DMABA) were investigated by differential scanning calorimetry around their ferroelectric phase transitions at 242 K and 164 K, respectively. From the anomalous parts of specific heats we calculated entropy changes associated with these transitions. Transition in DMACA is an order-disorder one connected with ferroelectric type ordering of dimethylammonium cations while the transition in DMABA is also of order-disorder type but of a complex mechanism.
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