The crystal growth rate of barium chromate in a spherical, 1 dm 3 capacity, batch stirred vessel was investigated, using the technique of precipitation from homogeneous solution (PFHS), by means of urea hydrolysis. The experimental conditions which were varied included rate of change of solubility, operating temperature and stirrer speed. The results were fitted to an empirical model for growth rate per unit surface area ( R G) of the form: R G = k 1 a k K2+ H C k4 t , where a H+ was the hydrogen ion activity (kmol/m 3); C t was the supersaturation based on barium ion concentrations (kmol/m 3); and R G was expressed in kg/m 2middot;s. The value of k 4 was 2 for all experimental conditions, while k 1 ranged from 0.6 × 10 -2 to 7.2 × 10 -2kg m (3 k 2+3 k 4-2) kmol (- k 2- k 4) s -1, and k 2 from -0.56 to -0.39. Growth rate was independent of both crystal size, expressed in terms of mean equivalent spherical volume diameters, and stirrer speed. Activation energies for crystal growth were in excess of 100 kJ/mol and strongly dependent upon the amount of urea used for PFHS. This evidence led to the conclusion that crystal growth was subject to surface integration control, with the probable rate determining step being removal of the inner hydration sphere of the barium ion.