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

Volume properties of the melts of the system KF-KCl-K₂TiF₆

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

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

Abstract: Using the Archimedean method the density of the  KF-KCl-K₂TiF₆ melts was measured. The experimentally determined dependences of the density of the investigated melts on the temperature were described by the linear plots ϱ=a—b.T. On the basis of the determined density values and of the mean molar mass, the values of the molar volumes and of the excess molar volumes at temperatures of 1000K, HOOK, and 1200К were cal­culated. In the boundary systems KF—K₂TiF  6 and KCl— K₂TiF₆ the congruently melting compounds K₃TiF₇ and K₃TiF₆Cl, respectively, are for­med. The arising compounds do not substantially affect the volume proper­ties of the investigated system, which indicates the expressive thermal dis­sociation of these compounds and/or the similarity in the volumes of the complex TiF₆^2-, TiF₇^3-, and TiF₆Cl^3- anions. The experimentally determined values of the density of the boundary binary systems KF—K₂TiF₆  and KCl—K₂TiF₆ were used for the calculation of the dissociation degree of the  K₃TiF₇ and K₃TiF₆Cl  compounds.

Full paper in Portable Document Format: 426a753.pdf

Chemical Papers 42 (6) 753–761 (1988)