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Title: Structures and stabilities of doubly charged (MgO) n(Mg)+1 n=1–29 cluster ions
Authors: Aguado, Andrés
López-Gejo, Francisco
López, José Manuel
Issue Date: 1999
Publisher: American Institute of Physics
Description: Producción Científica
Citation: Journal of Chemical Physics v. 110, n. 10, (1999) p. 4788-4796
Abstract: Ab initio perturbed ion plus polarization calculations are reported for doubly charged nonstoichiometric (MgO)nMg21 (n=1 – 29) cluster ions. We consider a large number of isomers with full relaxations of the geometries, and add the correlation correction to the Hartree–Fock energies for all cluster sizes. The polarization contribution is included at a semiempirical level also for all cluster sizes. Comparison is made with theoretical results for neutral (MgO)n clusters and singly charged alkali–halide cluster ions. Our method is also compared to phenomenological pair potential models in order to assess their reliability for calculations on small ionic systems. The large coordination-dependent polarizabilities of oxide anions favor the formation of surface sites, and thus bulk-like structures begin to dominate only after n524. The relative stabilities of the cluster ions against evaporation of an MgO molecule show variations that are in excellent agreement with the experimental abundance spectra
Keywords: Iones
Peer Review: SI
DOI: 10.1063/1.478366
Publisher Version:
Rights Owner: © Todos los derechos reservados
Language: eng
Rights: info:eu-repo/semantics/restrictedAccess
Appears in Collections:DEP33 - Artículos de revista

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