The Fractal Geometric Properties of Etch Pits on(111) Surface of Face-Central Cubic System

In this paper, the replipotential concept of etch pits on（111） surface of face-central cubic system, is presented by phenomenological method. The concept is reduplicated etch pits of crystal defect. The replipotentinl has reduplicated properties of self-similsr by Sierpinski gasket. This method is used to analyses fractal gevmetric characters of microscopy of electrochemistrical etch pits on（111） surface of facecentral cubic system.
Finally, in order to compare it with the experimental study, on the microstructure of Cd_1-xZn_xTe crystal by scanning electron microscopy,the theoritical result is in accord with the elch pits on surface of 111 direction.