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Interest towards the chemistry of elemental Gallium arises for many, variously related, aspects. The density of the liquid higher than that of the main solid phase (α) places Ga into the minority set of substances that show increasing stability of the liquid with increasing pressure and generically indicates an anomalous bonding behaviour with respect to other metals. Alpha Gallium is indeed a very particular metal made of diatomic units with a marked pseudo gap in the density of states at the Fermi level and strongly anisotropic electronic conductivity. The bonding behaviour can also be affected by the additional free energy contribution occurring at a phase boundary: the interfacial region is expected to be richer, with respect to bulk, in the species that show less strong bonds among each other. For Gallium, this picture suggests preference for a structure based on dimeric units, where the weak bonds between units are …
Editrice Compositori; 1999
Publication date: 
1 Jan 2007

P Ghigna, G Spinolo, GB Parravicini, R Kofman, A Migliori

Biblio References: 
Volume: 94 Pages: 439