J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981International Conference on Phonon Physics
|Page(s)||C6-572 - C6-574|
J. Phys. Colloques 42 (1981) C6-572-C6-574
ORIENTATIONAL DYNAMICS OF SULPHATE IONS IN POTASH ALUMA.K. Sood, A.K. Arora, S. Dattagupta et G. Venkataraman
Reactor Research Centre, Kalpakkam 603 102, Tamil Nadu, India
The Ag internal mode of sulphate ion in potash alum is studied by Raman scattering as a function of temperature. Our data suggest that over and above the thermally-activated reorientations of sulphate ion, there is an additional orientational relaxation mechanism which has its origin in cooperative interaction between sulphate ions.