ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Problems of the stability of the anion AlF₆^3- in the molten system NaCl—Na₃AlF₆

I. Koštenská and M. Malinovský

Department of Inorganic Technology, Slovak Technical University, 88O 37 Bratislava

Abstract: The course of the liquidus curve of NaCl in the system NaCl-Na₃AlF₆ was measured. The system exhibits a eutectic point with the coordinates of 89 mole % NaCl, 11 mole % Na₃AlF₆, at 737°C. The soly. of Na3AlF6 in solid NaCl is negligible. Different dissocn. schemes of Na₂AlF₆ in this system with an excess of NaCl were discussed and the effect of the nature of dissocn. of Na₃AlF₆ on the liquidus of NaCl was detd. It has been proved that the assumption of the existence of the complex anions AlF₆^3- in melts of this system is consistent with the course of the liquidus curve of NaCl in the concn. range of1.2-11.0 mole % Na₃AlF₆.

Full paper in Portable Document Format: 284a553.pdf

Chemical Papers 28 (4) 553–560 (1974)