A Raman spectroscopic study of cesium sulphate at high pressure

High pressure Raman spectroscopic investigations have been carried out on C s2SO4 up to a pressure of 164 kbar. The behaviour of the internal modes of sulphate ions as a function of pressure are examined. in contrast to other disulphates, cesium sulphate does not exhibit any phase transition up to th e highest pressures reached in the present investigations. Present results are discussed in the light of earlier studies on other disulphates.