Caesium fulleride

Cs NMR of Crystalline Caesium Compounds Cs NMR of Minerals and Zeolites Cs NMR of Fullerides, Superionic Conductors and Semiconductors La NMR... 

Figure 7.28). If we consider as spheres, this leads to the normal four spheres, eight tetrahedral holes and four octahedral holes per unit cell of a face-centred cubic lattice. The two holes have significant size differences, and as a result has extensive intercalation chemistry. For example, caesium is too large to be accommodated in the tetrahedral holes but fits comfortably into the octahedral holes. Once has been reduced it is known as a fulleride. The intercalated ions are mostly either metals of Group 1 or 2, where the former is most common. 

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