Molecular and ionic associates in the saturated vapor over erbium trichloride and the ErCl3 - DyCl3 system

The aims of the work are: determination of sublimation enthalpies of erbium trichloride as molecular associates, refinement of sublimation enthalpies in the form of monomer molecules and recovery of thermochemical characteristics and ion components of vapor over the erbium trichloride and the ErCl3 - DyCl3 system. The high temperature (969 - 1097 K) mass spectrometry was used for the investigation into the composition of saturated vapor over the erbium trichloride and ErCl3 - DyCl3 system, the partial pressures of the neutral components of the vapor were determined. The results of the calculations of the erbium trichloride sublimation enthalpies as monomer, dimer and trimer molecules are demonstrated. The formation enthalpies of the molecules were determined based on the obtained sublimation enthalpies and the formation enthalpies of the erbium trichloride in condensed state. The formation enthalpies of the ions were determined on the basis of enthalpies of ion-molecular reactions. The formation enthalpies of the dimer, trimer mixed molecules and ion associates were determined for the first time