Phase Equilibria in the СaMoO4–СaSO4–СaF2–СaCl2 System

— Phase equilibria in the quaternary system СaMoO 4 –СaSO 4 –СaF 2 –СaCl 2 have been studied using physicochemical analysis (differential thermal analysis). We have determined the composition, melting point, and enthalpy of fusion of the quaternary peritectic point (melting point, 650°C; composition: 33.8% CaF 2 , 45% CaCl 2 , 16.2% CaSO 4 , and 5% CaMoO 4 ; enthalpy of fusion, 256 ± 5.1 kJ/kg) and quaternary eutectic point (melting point, 586°C; composition: 15.8% CaF 2 , 73.3% CaCl 2 , 9.9% CaSO 4 , and 1% CaMoO 4 ; enthalpy of fusion, 485 ± 9.7 kJ/kg) in the system studied.