During the last decade there has been an increasing interest in clusters and small particles because of the peculiar proper- ties induced by their large area to volume ratio. For that reason small particles are often considered as an intermediate state of matter at the border between atomic (or molecular) chemistry, and physics of the condensed matter. The importance of the surface effect can explain the anomalous properties, for example the exis- tence of the five fold symmetry observed in different circumstan- ces '(beams of rare gas clusters, gold particles deposited on a substrate)....