The ionization-potential measurements of LinHm dusters with 3 less tha
n or equal to n less than or equal to 11 and 0 less than or equal to m
less than or equal to 6 are presented. Their evolution is dominated b
y the number of electrons which are delocalized in the cluster. The an
alysis is in favor of a segregation between a metallic part and an ins
ulating part in the mixed cluster. By comparison with alkali-halide cl
usters results, the existence of possible cuboid structures is discuss
ed.