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We discuss the electronic structure, bonding and physical properties of the gold cluster compound Auss(PPh3)l~C16.Results from our experimental measurements, including EXAFS, specific heat, MSssbauer, UV-visible and photoelectron spectroscopy, are combined with those of other work to form a consistent physical picture of the system. The bonding in Anss(PPh3)I~CI6 is much more delocalised and nondirectional than in smaller gold cluster molecules. The Au~s cluster exhibits a substantial degree of metallic bonding, while displaying some of the characteristics of a discrete energy level spectrum.

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