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Rietveld refinement study of vanadium distribution in V+4–ZrSiO4 solid solutions obtained from gels

2002; Elsevier BV; Volume: 22; Issue: 12 Linguagem: Inglês

10.1016/s0955-2219(01)00521-0

1873-619X

Francisco José Torres, M. A. Tena, Javier Alarcón,

Advanced Condensed Matter Physics

Abstract Vanadium-containing zircon gel precursors with nominal compositions Vx–ZrSiO4 with x=0.0, 0.004, 0.01, 0.04 and 0.2 were prepared by a previously reported colloidal sol-gel technique and annealed for 30 h at 1400 °C. The Rietveld refinement of the structures by X-ray powder diffraction confirms previous results concerning the limit of solubility of V+4 in the zircon structure. The new finding regarding with the entry of V+4 in the Zr+4 site for zircon doped with high contents of vanadium is in accordance with reported results.