Between Covalent and Metallic Bonding: From Clusters to Intermetallics of 
Bismuth

Ruck, M.

doi:10.1016/B978-0-12-409547-2.11445-3

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Between Covalent and Metallic Bonding: From Clusters to Intermetallics of Bismuth

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Ruck, M.
Michael Ruck, Max Planck Fellow, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Ruck, M. (2015). Between Covalent and Metallic Bonding: From Clusters to Intermetallics of Bismuth. In Reference Module in Chemistry, Molecular Sciences and Chemical Engineering (pp. 1-11). Elsevier. doi:10.1016/B978-0-12-409547-2.11445-3.

Cite as: https://hdl.handle.net/21.11116/0000-000D-A789-C

Abstract

Bismuth-rich compounds are a showcase for the competition between directed localized bonds and delocalized multicenter bonding, because of the diffuse character of the 6p valence orbital. This competition exists in molecular units, such as clusters or polycations, and in extended networks. By combining bismuth with electron-rich transition metals, a wide variety of subvalent halides and oxides become available, modeling the structural transition from clusters to intermetallics. These stable low-dimensional metals show extraordinary physical and chemical properties, such as coexistence of ferromagnetism and superconductivity, topological insulator behavior, topochemical ion exchange, and oxide ion conductivity at room temperature.