Artículos de revistas
Characterization of nickel doped Zn7Sb2O12 spinel phase using Rietveld refinement
Fecha
2003-09-01Registro en:
Powder Diffraction. Newtown Sq: J C P D S-int Centre Diffraction Data, v. 18, n. 3, p. 219-223, 2003.
0885-7156
10.1154/1.1572486
WOS:000185267600004
WOS000185267600004.pdf
1353862414532005
0000-0002-7734-4069
Autor
Universidade Estadual Paulista (Unesp)
Universidade Federal da Paraíba (UFPB)
Universidade Federal de São Carlos (UFSCar)
Institución
Resumen
Zn7Sb2O12 is known to adopt an inverse spinel crystal structure, in which Zn2+ occupies the eight tetrahedral positions and Sb5+ and Zn2+ randomly occupy the 16 octahedral positions. Samples of Zn7-xNixSb2O12 (X = 0, 1, 2, 3, and 4) were synthesized using a modified polymeric precursor method, known as the Pechini method. The crystal structure of the powders was characterized by Rietveld refinement with X-ray diffraction data. The results show that for X = 0, 1, and 2 Ni substitutes for Zn2+ in the octahedral sites, and that for X = 3 and 4 it is assumed that Ni2+ replaces Zn2+ ions in both the octahedral and tetrahedral positions. It is also observed for x = 3 and 4 the formation of two spinel phases. (C) 2003 International Centre for Diffraction Data.