ISSN print edition: 0366-6352
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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 TiF62-, TiF73-, and TiF6Cl3- 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)

Monday, July 26, 2021

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