Synthesis and structural characterization of luminescent materials. The elpasolite Cs2NaTbCl6

Abstract

In this work we report the synthesis and structural characterization of the elpasolite Cs2NaTbCl6, belonging to the space group Fm3m. The synthesis is by solid state reaction, in controlled atmosphere. By means of thermal analysis (DTA/TGA), the best crystallization temperatures were obtained: 772.2 °C for 2 hours. Structural studies are carried out by means of DRX-powder diffraction and application of the Rietveld profiles refinement method, for the 32 diffraction lines analyzed. The following crystallographic parameters are obtained: a0=10.7636 (Å), Z=4, M=660.44, V=1247.0 (Å)3, Dx=3.519, and Dexp=3.52±0.01.