The original Hamilton and Seidensticker model may explain the anisotropic growth of nonionic fcc crystals, provided stringent requirements for the nucleation of one-dimensional clusters (i.e., strings) are satisfied. However, revisions that account for the drop in the coordination number during growth are necessary for the general applicability of the model.

• Received 25 August 1994

DOI:https://doi.org/10.1103/PhysRevB.51.8655