A profitable merger: The reaction of K5Bi4 with ZnPh2 yields the 20-atom cluster [Zn@(Zn8Bi4)@Bi7]5− (see structure; zinc green, bismuth orange), which consists of a central zinc atom within a Zn8Bi4 icosahedron (red) capped by seven bismuth atoms. Extensive amalgamation of the two types of atoms, reminiscent of an alloy, occurs in this intermetalloid cluster.
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Goicoechea et al. (2006) studied this question.
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