Kinetics of Crystal Growth and Dissolution of Calcium and Magnesium Fluorides

Abstract
The crystal growth and dissolution of calcium fluoride and magnesium fluoride are controlled by a reaction at the crystal surface. The activation energy for growth and dissolution of calcium fluoride was found to be 14.5 and 17.4 kcal mole-1, respectively, and the heat of solution, obtained from separate calorimetric experiments was 2.9 ± 0.1 kcal mole-1.