A Complex Ion Model for Molten Halides

A. D. Pelton

doi:10.1139/v71-658

journal article Dec 15, 1971

A Complex Ion Model for Molten Halides

A. D. Pelton

Canadian Journal of Chemistry Vol. 49 No. 24 pp. 3919-3934 · Canadian Science Publishing

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Abstract

The formation of complex anions in molten halide systems is treated semi-quantitatively by a discrete complex anion model. The treatment is a more general application and extension of an approach reported previously by the author. By assuming the existence of discrete MY42− tetrahalo complex anions, the model gives good agreement to experimental enthalpies and entropies of mixing and electrical conductivities in a large number of different halide systems of the general formula MY2–AY, where M is a divalent metal, and A is an alkali. Very few adjustable parameters are required. The parameters provide semi-quantitative basicity (or acidity) scales by which molten salts and slags may be classified. The relationships of these basicity scales to ionic radii, ligand field stabilization energies, etc. are shown. General thermodynamic and mathematical aspects of the problem of complexing are discussed, particularly as regards the proper method of calculating the degree of dissociation of the complexes.

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Dynamic criterion of the complex formation and the structure of molten halides: To the fortieth anniversary of the autocomplex model for the structure of melts

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Russian Journal of Electrochemistry

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Published: Dec 15, 1971
Vol/Issue: 49(24)
Pages: 3919-3934
License: View

Authors

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A. D. Pelton

Cite This Article

A. D. Pelton (1971). A Complex Ion Model for Molten Halides. Canadian Journal of Chemistry, 49(24), 3919-3934. https://doi.org/10.1139/v71-658

A Complex Ion Model for Molten Halides

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