Thermochemistry and Fluorinating Ability of Cerium Tetrafluoride

The experimental literature data on the thermal stability and fluorinating ability of cerium(IV) fluoride have been critically reviewed. Based on experiments involving the co-fluorination of CeF3(cr) and platinum, the value of ΔfHo(CeF4, c, 298 K) = –1939.9 ± 7.6 kJ/mol was determined. The most reliable value for the sublimation enthalpy of cerium tetrafluoride was selected as ΔsHo(CeF4, 298 K) = 270.2 ± 1.7 kJ/mol, and the formation enthalpy was calculated as ΔfHo(CeF4, g, 298 K) = –1669.6 ± 7.8 kJ/mol. A comparison of CeF4(cr) with other solid-phase fluorinating agents was carried out.