Liquidus Temperature and Density of CsBr–KBr–MoBr₃ Melts

Abstract—The melting of the 60CsBr–40KBr–MoBr₃ (mol %) compositions is studied by synchronous thermal analysis and measuring cooling curves. The concentration dependence of the liquidus temperature of the CsBr–KBr–MoBr₃ melts is determined. An increase in the MoBr₃ concentration from 0 to 16 wt % is found to lead to an increase in the liquidus temperature from 841 to 951 K. An increase in the MoBr₃ concentration from 2 to 16 wt % is shown to result in an increase in the relative mass loss from 3 to 13 wt %. According to X‑ray diffraction data, MoBr₃ solidifies from the CsBr–KBr–MoBr₃ melt in the form of an individual phase. Hydrostatic weighing is used to study the density of the 60CsBr–40KBr–MoBr₃ (mol %) melt. An increase in the MoBr₃ concentration from 2 to 8 wt % in the CsBr–KBr–MoBr₃ melts is found to increase the density. The density of the 60CsBr–40KBr–MoBr₃ (mol %) melts decreases as the temperature increases. The density of (60 mol % CsBr–40 mol % KBr)–MoBr₃ (0–8 wt %) melts varies within a range of 2.69–3.20 g/cm³ in a temperature range of 871–1071 K.