Preparation, thermal analysis, and crystal structure refinement of the quaternary alloy (CuIn)_(2)NbTe_(5)

P. Grima-Gallardo ^[2] ; M. Palmera ^[3] ; J.A. Aitken ^[4] ; J. Cisterna ^[1] ; I. Brito ^[1] ; G.E. Delgado ^[5]
1. [1] Universidad de Antofagasta
  
  Universidad de Antofagasta
  
  Antofagasta, Chile
2. [2] Universidad de Los Andes, Mérida, Venezuela
3. [3] Centro Nacional de Tecnologías Ópticas y Centro de Investigaciones de Astronomía, Mérida, Venezuela
4. [4] Duquesne University,Pittsburgh, Pennsylvania, United States
5. [5] Universidad de Antofagasta, Chile / Universidad de los Andes, Mérida, Venezuela
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Localización: Revista Mexicana de Física, ISSN-e 0035-001X, Vol. 68, Nº. 1, 2022, págs. 60-66
Idioma: inglés
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Resumen
- The quaternary alloy (CuIn)_(2)NbTe_5) was synthesized by solid-state reaction using the melt and annealing technique. The thermal análisis shows that this compound melts at 1026 K. The present alloy is isotypic with Cu_(2)FeIn_(2)Se_(5) and crystallizes in the space group P ̄42c(N◦112),with unit cell parameters a = 6.1964(2) Å, c = 12.4761(4) Å, c/a = 2.01, V = 479.02(3) Å^(3). (CuIn)_(2)NbTe_(5), belonging to the system (CuInSe_(2))_(1−x)(FeSe)_(x) with x = 1/3, is a new adamantane compound with a P−chalcopyrite structure. This structure is characterized by a double alternation of anions-cations layers according to the Te-Te: Nb-In-Nb-In: Cu-In-Cu-In: Te-Te sequence, along the 010 direction.