Growth from the vapour by surface nucleation

The experimental conditions under which cadmium sulphide is grown from the vapour to form crystals having a (11.0) singular growth faces are calculated. This is done assuming that growth proceeds on these faces by one-dimensional surface nucleation. Calculations based on this assumption are compared with experimental observations on the habit of CdS, and the relationship between growth rate and supersaturation, and shown to be consistent with these.