PHASE-DIAGRAM AND RAMAN-SPECTROSCOPY OF EUCL2-NACL BINARY-MIXTURES

A phase diagram of the EuCl2-NaCl system was determined by differentia l scanning calorimetry (DSC) and the activity coefficients of EuCl2 an d NaCl in this system were estimated under some assumptions. According to DSC measurement, it was found that there were two phase transition s at 1123.9 K and 1016.8 K. In order to specify the melting point of E uCl2 we did Raman spectroscopy experiments. Thus, the melting point of EuCl2 was evaluated to be 1016.8 K which was detected as the lower pe ak in the DSC curve. Raman spectroscopy of this system suggested that complex species were not formed clearly in the EuCl2 poor system and t he estimated activity coefficients of EuCl2 also supported this sugges tion. (C) 1997 Elsevier Science S.A.