Synthesis, structural characterization and differential thermal analysis of the quaternary compound Ag_(2)MnSnS_(4)

• G.E. Delgado ^[1] ; N. Sierralta ^[1] ; M. Quintero ^[1] ; E. Quintero ^[1] ; E. Moreno ^[1] ; J.A. Flores-Cruz ^[2]
  1. [1] Universidad de Los Andes (Venezuela)

     Universidad de Los Andes (Venezuela)

     Venezuela

     
  2. [2] Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-Instituto Politécnico Nacional, México
• Localización: Revista Mexicana de Física, ISSN-e 0035-001X, Vol. 64, Nº. 3, 2018, págs. 216-221
• Idioma: inglés
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• Resumen

  • The quaternary chalcogenide compound Ag_(2)MnSnS_(4) belonging to the system I2-II-IV-VI_(4) and synthesized by the melt and anneal technique, was characterized by Rietveld refinement of the powder X-ray diffraction data and differential thermal analysis (DTA). It was found that Ag_(2)MnSnS_(4) crystallizes in the orthorhombic space group Pmn2_(1), with unit cell parameters a = 8.1705(5) Å, b = 6.9413(5) Å, c = 6.6532(5) Å, and V = 377.33(5) Å 3 , in a wurtzite-stannite structure. The DTA indicates that this compound melts at 790 ◦C and that the phase relations which occurs in the material would be: α → α + α_(1) → α_(1) → α_(1) + β → β → β_(1) + L → L, were α is the orthorhombic wurtzite-stannite Pmn2_(1) structure; α_(1) is a high temperature modification; and β and β_(1) are the zinc-blende structure and its high-temperature modification, respectively.