Structure and Morphology of Polar Crystals
Zhong Weizhuo Hua Sukun Shi Erwei (Shanghai Institute of Ceiamics. Acadermia Sinica, Shanghai, 201800)
The relation between the structure of polar crystals and their morphology has been investigated in this article. It is suggested that symmetrical axis of the structure-units whose ends are not symmetrical is parallel to the polar axis Based on distributing orientation of the structure-units and matching relation of the growth-units in crystals, appearance of every face is discussed and difference of growth rate of positive or negative polar face have been explained.