  We investigate the structure of 13-particle clusters in binary alloys for
various size ratios and different concentrations via MD simulation. Our goal is
to predict which systems are likely to form local icosahedral structures when
rapidly supercooled from the melt. We calculate the energy spectrum of the
minimal energy structures, and characterize all detected minima from both their
relative probability and from a structural point of view. We identify regions
in our parameter space where the icosahedral structure is dominant (like in the
corresponding monoatomic case), regions where the icosahedral structure
disappears and other where icosahedral structures are present but not dominant.
Finally, we compare our results with simulations reported in literature and
performed on extended binary systems with various size ratios and at different
concentration
