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Two Metalloid Ga22 Clusters Containing a Novel Ga22 Core with an Icosahedral Ga12 Center

“…To prepare a large amount of the cluster compound containing the [Ga 64 (GaR) 20 ] 4À unit (R = N(SiMe 3 ) 2 ), [6] which exhibits unexpected conductivity behavior (superconductivity below 7 K and metallic conductivity above 7 K), [7,8] we applied a new technique for the synthesis of the metastable GaBr solution which is the essential starting material for most of the metalloid Ga cluster compounds. [5] This new technique has been applied recently for the preparation of metastable GeBr.…”

27Al NMR Study of the Metal Cluster Compound Al50C120H180

“…Indeed, recently compelling evidence was obtained from 69,71 Ga-NMR studies [16] for the occurrence of band-type conductivity by intercluster charge transfer in crystallographically fully characterized Ga 84 cluster compounds, composed of giant Ga 84 cluster molecules that display mixed-valency properties [17,18]. In addition bulk superconductivity has been observed for these compounds [19][20][21] below a transition temperature T c % 8 K, much higher in fact than known for bulkGa metal ( T c % 1 K).…”

[Ga51(PtBu2)14Br6]3−: An Elementoid Gallium Cluster with Metalloid and Nonmetalloid Structural Elements

“…cluster (4) [18] (metallic conductivity, [19] superconductivity [20] ), we are also planning similar investigations for 1. In addition to the threefold negative charge of 1 a, a partial lower charge (for example 1À), which could be balanced by a dilution in the cationic lattice of the Li 3 Bi lattice structure of the Ga 51 cluster (see Figure 4), is also conceivable for 1.…”