High-Temperature Phase-Transition Heat-Accumulating Materials Based on $\mathrm{Li}, \mathrm{Na}, \mathrm{Ca}, \mathrm{Ba}{\parallel}\mathrm{F}, \mathrm{MoO}_4$ System and Their Properties

The issues of the physical and chemical analysis of multicomponent systems (MCSs) are considered with the aim to find phase-transition heat-accumulating materials (PHAMs). New salt compositions of eutectic proportions formed by molybdates and fluorides of alkali ($\text{Li}$ and $\text{Na}$) and alkaline earth ($\text{Ca}$ and $\text{Ba}$) metals, obtained experimentally, are proposed as PHAMs. Their heat of fusion and heat capacity are determined.