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Structure of molten systems KFK 2 TiF 6 and KCL‐K 2 TiF 6
Author(s) -
Danêk V.,
Matiašovský K.
Publication year - 1989
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19895700120
Subject(s) - ionic bonding , standard enthalpy change of formation , enthalpy , thermodynamics , fusion , ion , dissociation (chemistry) , chemistry , analytical chemistry (journal) , physics , organic chemistry , linguistics , philosophy , chromatography
Congruently melting compounds K 3 TiF 7 and K 3 TiF 6 Cl which are formed in the systems KFK 2 TiF 6 and KClK 2 TiF 6 , respectively, exhibit a strong influence on the structure (ionic composition) of the melts of the corresponding systems. Considering the relatively low symmetry and a high energetic state of the TiF 7 3− and TiF 6 Cl 3− complex ions, a high degree of their thermal dissociation might be expected. This assumption was confirmed by two different methods based on a thermodynamic analysis of the phase equilibria and of the volume properties of the investigated systems, respectively. In connection with the former method, the values of the enthalpy of fusion of K 2 TiF 6 , K 3 TiF 7 , and K 3 TiF 6 Cl which were used in the calculations have also been estimated.