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In this work, a study of the role of chemical substitution in the properties of the solid solution Sr(1-x)PbxWO(4) (x = 0, 0.5 and 1) is presented. Polycrystalline samples were synthesized by solid state reaction at 1100 degrees C. Using Rietveld method, the structural parameters of all samples were refined. All structures are of scheelite type Scanning electron microscopy showed that a high level of crystallization characterized the samples, with modifications in sizes and shapes depending on composition x. The Infrared and Raman spectroscopies were performed to characterize the evolution of vibrational modes with composition x. Finally, a systematic study of luminescence under X-ray and UV excitations was performed. The energies and intensities of luminescence depended on composition x and on the nature of excitations.

Synthesis, characterization and luminescent properties ofSr1-xPbxWO4solid solution (x=0, 0.5 and 1)