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Inne
Dielectric properties and characterisation of the superionic phase of [C(NH2)3]2SbCl5· [C(CH2)3]Cl (GHCA).
Autorzy
Rok wydania
1995
Czasopismo
Zeitschrift für Naturforschung Section A: A Journal of Physical Sciences
Numer woluminu
50a
Strony
888-892
DOI
10.1515/zna-1995-0916
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
GHCA undergoes four phase transitions at Tc1 = 402 K, Tc2 = 373 K, Tc3 = 162 K, and Tc4 = 146 K. Below Tc3 it possesses pyroelectric properties with the spontaneous polarization vector (Ps) in the ac plane and the maximum along the c axis equal to 8 μC/m2. Dielectric dispersion studies of GHCA show that the main dielectric dispersion connected probably with collective motions of chlorine ions is above 1GHz. For the phase transition at Tc2 to a superionic phase the thermal dilatation and electric conductivity were measured. The anomalies of the electric conductivity at Tc2 and Tc1 were observed with large values of σ(10-3 S/m) above Tc3. The guanidinium cations above Tc2, besides reorientational motions, undergo slow self diffusion.
Słowa kluczowe
Guanidinium, chloroantimonate, phase transition, DSC, dilatometric, pyroelectric, electric conductivity
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