Network and Cluster-Like Structures in ScCl3-CsCl Melts

The present work concerns with a systematic Raman spectroscopic investigation of the structural properties of molten mixtures of ScCl3-CsCl in the complete composition range. The temperature and composition effects on the Raman spectra have been carefully measured and used to identify the possible structural entities present. In dilute in ScCl3 melts and at compositions up to 25 mol% ScCl3 the following equilibrium is established: ScCl − 4 7 ScCl − 6 + Cl − which shift to the write with increasing temperature and/or ScCl3 mole fraction. At intermediate compositions with 0.25 < X 3 ScCl < 0.7 the Raman spectra indicate (e.g. Fig. 1) a multispecies equilibrium involving at least three species: 2 Sc2Cl − 9 3 ScCl 4 + ScCl − 3 6