Abstract—The issues of the physical and chemical analysis of
multicomponent systems (MCSs) are considered with the aim to find
phasetransition heataccumulating materials (PHAMs). New salt
compositions of eutectic proportions formed by molybdates and
fluorides of alkali (Li and Na) and alkaline earth (Ca and Ba)
metals, obtained experimentally, are proposed as PHAMs. Their heat
of fusion and heat capacity are determined.