Speed of sound in binary molten mixtures of potassium halides

The speed of sound in binary molten $\rm KCl$–$\rm KBr$, $\rm KCl$–$\rm KI$, $\rm KBr$–$\rm KI$, $\rm KF$–$\rm KCl$, $\rm KF$–$\rm KBr$, and $\rm KF$–$\rm KI$ mixtures has been measured by the pulse-temporal method in wide temperature and composition ranges. The adiabatic compressibility and molecular speed of sound have been calculated based on the literature data on density. The results are analyzed from the point of view of structural transformation in ionic melts, which accompanies the mixing of salts with different ion sizes.