The precipitation of barium‐, strontium‐ and calcium molybdates from aqueous solution: Kinetics of the crystal growth

Abstract

AbstractThe kinetics of precipitation of barium, strontium and calcium molybdates, from supersaturated aqueous solutions of initial solute concentrations C0 = 0.0004 to 0.003 M, C0 = 0.002 to 0.015 M and C0 = 0.1 to 0.06 M, respectively, were studied at 25° by conductivity measurements and chemical analysis. Nucleation occurred during induction periods and continuous crystal growth then took place onto the crystallites formed during the induction periods. The growth rates at any time were expressed, in terms of degree of crystallisation, by the relation equation image .The rate constants (kα) for the crystal growth of barium, strontium and calcium molybdates at 25° were 7700, 200, and 8.7 sec−1 M−2, respectively.