Fulleride solid state chemistry: Gospel, heresies and mysteries

The superconducting properties of fullerene intercalation compounds can be rationalized fairly well in the context of standard theories. In contrast, our understanding of correlations between properties and chemical composition, crystal structure, molecular orientations and valency remains rudimentary. Key features which were believed to be well understood have been called into question by recent experiments while others remain unexplained. (C) 1997 Elsevier Science Ltd.