AbstractThe crystallisation kinetics of strontium tungstate from unstirred saturated solutions in sodium tungstate melts was studied by continuous cooling from initial crystallisation temperaturesT0= 1000° to 800°C to room temperature at cooling ratesRT= 0.67° to 3.3°C min−1. The main crystal growth was diffusion rate‐controlled; the final crystal growth was rate‐controlled by the development rate of excess solute concentration. The estimated diffusion rate constant (kD) values increased with cooling rates and initial crystallisation temperatures. They are higher than the rate constants for diffusion‐controlled growth of calcium tungstate from sodium tungstate melts, but very much smaller than those for strontium tungstate from lithium chl