THERMAL EXPANSION OF SODIUM CHLORATE AND BROMATE

Abstract

The thermal expansion of sodmm chlorate has been measured from -151.3C to + 11.4°C and is found to join up well with the high temperature data of Sharma (1950).The expansion coefficient of sodium bromate was investigated from -149°C to +171C. The high temperature data are not in agreement with Sharma's values.Using an approximate vibration spectrum which corresponds roughly with the observed Raman effect data the specific heat and thermal expansion of sodium chlorate can be satisfactorily accounted for the empirically chosen GrUneisen constants for the internal and lattice oscillations to account for the thermal expansion correspond closely to the values determined from the temperature variation of Raman spectrum for this crystal.