Caracterização estrutural, térmica e óptica da solução sólida Sn_34 Se_33 S_33 via síntese mecânica

Abstract

In this research we work on the synthesis of solid solutions of the trigonal system, space group P-3m1 (164) of prototype with a fraction of the sulfur sites occupied by selenium atoms. In order to produce the largest possible substitutional disorder, the stoichiometry of

was chosen. In this structure the Wickoff sites occupied by the Sn (1a) atoms correspond to 100% while the 2d sites are occupied with 50% Se and 50% S while maintaining the structural prototype of . We apply the technique of mechanical synthesis in different grinding times followed by measurements of x-ray diffraction and differential scanning calorimetry. Some samples were selected from these analyzes to be studied by electron microscopy and Raman spectroscopy.