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

Enthalpy of Mixing of Melts in the KF—K₂TiF₆ System

I. Nerád, L. Kosa, E. Mikšíková, and K. Adamkovičová

Institute of Inorganic Chemistry, Slovak Academy of Sciences, SK-842 36 Bratislava

Abstract: Relative enthalpies of melts in the system KF-K₂TiF₆ at mole fractions of K₂TiF₆ equal to 0.25, 0.50, 0.75, and 1.0 have been determined from drop calorimetry measurements at the temperature 1198 K. The enthalpies of mixing and excess entropies of mixing have been calculated from experimental data. The ∆_mixH has been found to be negative in the whole composition range of the system. The exothermic effect at mixing reaches minimum of -4.9 kJ mol^-1 at the composition around x(K₂TiF₆) = 0.52. The course of ∆_mixH curve indicates the tendency to association of the particles in the melt, producing more complex structural units.

Full paper in Portable Document Format: 531a3.pdf

Chemical Papers 53 (1) 3–5 (1999)