X-ray powder diffraction study of monoclinic V4+-ZrO2 solid solutions obtained from gels
2003; Elsevier BV; Volume: 173; Issue: 1 Linguagem: Inglês
10.1016/s0022-4596(03)00075-6
ISSN1095-726X
AutoresFrancisco José Torres, José M. Amigó, Javier Alarcón,
Tópico(s)Thermal and Kinetic Analysis
ResumoRietveld refinement of six monoclinic VxZr1−xO2 solid solutions, with x=0, 0.01, 0.02, 0.05, 0.075 and 0.1, prepared by heating dried gel precursors at 1300°C in air atmosphere, has been characterized using X-ray powder diffractometer data. The present results confirm that crystal structure of these solid solutions contain V4+(Zr4+) cations surrounded by seven oxygens, four at a distance between 2.13 and 2.28 Å (referred as to O(2) in the tetrahedrally coordinated oxygens) and other three at a distance between 2.03 and 2.20 Å (denoted as O(1) in the triangularly coordinated oxygens). The trends in the lattice parameter variation of VxZr1−xO2 solid solutions specimens with the nominal vanadium amount are in accordance with previous results obtained by experiments measured using an internal standard.
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