Abstract
The influence of the pH on both the habit and the growth rate of α-LiIO 3 crystals grown from solution by a constant temperature evaporation method has been studied under static and rotary conditions. The results indicated that the morphology of the α-LiIO 3 crystals grown had hexagonal prismatic faces {10ovbar|10} and hexagonal double pyramidal faces {10ovbar|11} and that the crystal growth rates along the z-direction V [0001] were faster than the rates in the opposite z-direction V [000 1 ] if the pH was more than a critical amount (pH c). If however, the pH was less than pH c, then the crystal habit was bounded by the prismatic faces {10ovbar|10} and the pyramidal faces {10ovbar|11} and {12ovbar|32}, and V [0001] was slower than V [000 1 ] . The mechanism to explain the reversal of the growth rate at pH c was proposed by means of the electrical double layer theory and the molecular adsorption theory.
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