THE PERIODIC SYSTEM OF METAL-CLUSTERS - A TOOL FOR DERIVING VARIOUS FORMS OF ]]CLUSTER-MATTER[[

A simple modified jellium model permits calculation of all the magic n umbers of large metal clusters M(N) up to N = 1432 in excellent agreem ent with experimental data. This success justifies further conclusions to be drawn from this model: (1) the calculated aufbau principle enab les construction of a Periodic System of (alkali metal) Clusters (PSC) ; (II) this PSC, strictly speaking a Periodic System of ''giant atoms' ', is a powerful tool for predicting the reactivity of free electron-l ike metal clusters; (III) the formation of cluster dimers is discussed exemplarily in detail in excellent agreement with experimental and th eoretical experience; (IV) various forms of cluster-matter are outline d in relation to new materials; (V) a great deal of work has to be don e to confirm a number of unconventional predictions: new experiments a nd new calculations are highly desirable.