ISBN-13: 9783639152890 / Angielski / Miękka / 2009 / 292 str.
A metal cluster is a group of metal atoms consistingof two to several thousand metal atoms in gas,liquid, solid, and plasma phase. Chemical physicistsstudying the spectra of transition metal clustersproduced in supersonic nozzle beams and detected byeither resonant two-photon ionization orphotofragmentation allude in their discussions to themetal-metal multiple bonding. In the field of clusterchemistry and physics the aim is to understand how achemical process depends on cluster size, how thechemistry of a metal changes with its state ofaggregation, and how structural, electronic, optical,and magnetic properties vary with cluster size,eventually reaching those of the bulk metal. Even forsmall transition metal (ionic) clusters, theirelectronic structures are complexes and remainquestions. For theory, too, the future holds itschallenges. Even cluster as small as diatomics mayprove difficult species to get right answers forbecause of the partially occupied d orbitals.Therefore, it is difficult to calculate theexchange-correlation energy contribution to thesystem in an accurate manner.