Endohedral Metalloheterofullerenes

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The present invention is directed to a family of endohedral metalloheterofullerenes representative generally as AX@C79N where A and X metal atoms. A and X may be lanthanide metals or rare earth metals. In some embodiments, A and X may be Yttrium, Scandium, Terbium, Lanthanum, Gadolinium, Holmium, Erbium, Thulium, or Ytterbium. A and X may be the same type of metal atom or they may be different. The endohedral metalloheterofullerenes are neutral compounds that can be readily isolated using standard chromatographic techniques. The endohedral metalloheterofullerenes exhibit parmagnetic properties.