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Structure and Properties of the KF—KCl—KBF4 Melts

V. Daněk, M. Chrenková, D. K. Nguyen, and K. Putyera

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

 

Abstract: On the basis of the phase diagram, density, conductivity, and viscosity measurements as well as the direct spectroscopic analysis, the structure of the KF-KCl-KBF4 melts has been elucidated. From the physicochemical analysis it follows that, a significant ternary interaction of all anions present in the melt takes place. The deviation from the ideal behaviour is due to the break off of the relatively weak B-F-B bonds between the BF4- tetrahedra, the mixing of anions with different ionic radius, as well as the exchange of the fluorine atoms in the BF4- tetrahedra for the chlorine ones. The presence of [BF4-nCln]- anions was confirmed by means of the IR spectroscopy of quenched samples.

Full paper in Portable Document Format: 512a69.pdf

 

Chemical Papers 51 (2) 69–72 (1997)

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