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The electrical conductance and the structure of the NaF AlF3 melts

J. Šiška, V. Daněk, K. Matiašovský, and A. Silný

Institute of inorganic Chemistry, Centre for Chemical Research, Slovak Academy of Sciences, CS-842 36 Bratislava

 

Abstract: The electrical conductance of the NaF—AlF3 melts, which are the essential ingredients of the aluminium electrolyte, was measured. The experimental conductivity values were interpreted from the standpoint of the structure (ionic composition) of the melts. The assumption about the incomplete dissociation of NaF, according to which the neutral ionic pairs of Na+ • F- besides the Na+ and F- ions are present in the melt, was confirmed. The dissociation degree of NaF was calculated and it was found that with increasing temperature the dissociation degree lowers. Also the diffusion coefficients of the Na+ and F- ions in the NaF melt were calculated.

Full paper in Portable Document Format: 426a743.pdf

 

Chemical Papers 42 (6) 743–751 (1988)

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