Hyperfine Characterization of Pure and Doped Zircons

✍ Scribed by Leticia Rubio-Puzzo; Marı́a C. Caracoche; Mario M. Cervera; Patricia C. Rivas; Anna Maria Ferrari; Federica Bondioli

• Book ID: 102605695
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 127 KB
• Volume: 150
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1999.8540

✦ Synopsis

The aim of this work has been to investigate the in6uence of two coloring dopant ions on the ZrSiO 4 host lattice. Pure, vanadium-doped and praseodymium-doped zircon powders have been synthesized by the ceramic method and analyzed using X-ray di4raction and the perturbed angular correlations (PAC) hyper5ne technique, which probes the nearest environments of zirconium ions. XRD results indicated that vanadium and praseodynamium incorporations in the host lattice result in crystalline solid solutions. In turn, PAC information allowed in both cases the determination of two contributions to the hyper5ne interaction. In the case of vanadium-doped zircon, V 4؉ substitutes mainly for Zr 4؉ and in a minor fraction for Si 4؉ or else it localizes at a tetrahedral interstitial site. In praseodymiumdoped zircon, a low fraction of Pr 4؉ cations locate at Zr 4؉ sites. A slight modi5cation of the zircon lattice is probably caused by the incorporation of the remaining cations at tetrahedral interstitial sites of the solid solution.