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Physics News Update
Number 153 (Story #2), November 29, 1993 by Phillip F. Schewe and Ben Stein

INDIUM-BASED FULLERENES , nested cage molecules made from indium (and sodium) atoms instead of carbon atoms, have been synthesized by scientists at Iowa State University. One typical molecule in this new class has a formula of Na96-In97-Z2, where Z can be nickel, palladium, or platinum; architecturally, it consists of an In74 cage surrounding a sodium cage, which in turn encloses In10-Z units. Such metallic endohedrons (polyhedrons of atoms enclosing other atoms) will facilitate a much more diverse chemistry than has been possible so far with carbon endohedrons, such as buckyballs with lanthanum inside. (Slavi Sevov and John Corbett, Science, 5 Nov. 1993.)