G. Tzolova et al., DETECTION AND STUDY OF STRUCTURAL PHASE-TRANSFORMATIONS IN CESIUM AMIDOSULFONATE, Crystal research and technology, 32(1), 1997, pp. 91-98
Three new structural phase transformations in the Cs amidosulfonate we
re detected and studied by means of DSC, X-ray diffraction. infrared s
pectroscopy and by measuring the temperature dependence of the dielect
ric constant of monocrystalline platelets. In the temperature range fr
om 325 to 345 K a second-order phase transition occurs. After completi
on of the second order-phase transformational a first-order phase tran
sformation proceeds. At higher temperatures (435 K) a lambda-transitio
n occurs. The transition temperatures, enthalpies and entropies of the
above reactions as well the melting temperature and the heat of melti
ng of the CsSO3NH2 were obtained. By means of the methods of H. KISSIN
GER and T. OZAWA the activation energies of the first order phase tran
sformation were determined.