Gd. Zissi et Gn. Papatheodorou, Changes of vibrational modes upon melting solid Cs2NaScCl6, Cs3ScCl6, Cs3Sc2Cl9 and ScCl3, CHEM P LETT, 308(1-2), 1999, pp. 51-57
Raman spectra of Cs2NaScCl6, Cs3ScCl6, Cs3Sc2Cl9 and ScCl3 compounds have b
een measured from 25 degrees C to temperatures above their melting points.
The vibrational modes of the discrete species ScCl63- and Sc2Cl93- in the s
olids are transferred upon melting into the liquid and participate in an eq
uilibrium involving ScCl4-. The spectra of solid ScCl3 are dominated by the
vibrational modes of a triple layer of ions consisting of edge-sharing ScC
l63- octahedra. Two main bands are seen in the melt spectra which infer a m
olecular liquid but a rather complex melt structure is suggested by the ove
rall physicochemical data. (C) 1999 Elsevier Science B.V. All rights reserv
ed.