The structure of molten rare-earth iodide-alkali iodide mixtures

Abstract

The composition and temperature dependence of the Raman spectra of molten LnI3-CsI (Ln = Ce, Dy, Ho) mixtures have been measured. Raman spectra of the polycrystalline compounds CeI3, DyI3, Cs 3CeI6, Cs3DyI6 and Cs 3Uy2I9 have also been measured from room temperature up to ∼ 750°C, where melting occurs for most of these salts. The data are correlated to previous studies involving rare-earth chlorides and bromides and are discussed in terms of the melt structure and the structural systematics of the rare-earth iodide-alkali iodide molten mixtures. © 2005 Verlag der Zeitschrift für Naturforschung, Tübingen.