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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Crystallographic analysis of the solid solution of iron doped potassium strontium niobate with tetragonal tungsten bronze structure

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Author(s):
Silvania Lanfredi [1] ; Marcos A. L. Nobre [2] ; Alan R. F. Lima [3]
Total Authors: 3
Affiliation:
[1] Universidade Estadual Paulista. Faculdade de Ciências e Tecnologia. Departamento de Física, Química e Biologia - Brasil
[2] Universidade Estadual Paulista. Faculdade de Ciências e Tecnologia. Departamento de Física, Química e Biologia - Brasil
[3] Universidade Estadual de Ponta Grossa. Departamento de Química - Brasil
Total Affiliations: 3
Document type: Journal article
Source: Química Nova; v. 33, n. 5, p. 1071-1076, 2010-00-00.
Field of knowledge: Physical Sciences and Mathematics - Chemistry
Abstract

Solid solution of iron doped potassium strontium niobate with KSr2(FeNb4)O15-Δ stoichiometry was prepared by high efficiency ball milling method. Structural characterization was carried out by X-ray diffraction. Crystalline structure was analyzed by the Rietveld refinements using the FullProf software. The results showed a tetragonal system with the tetragonal tungsten bronze structure - TTB (a = 12.4631 (2) Å and c = 3.9322 (6) Å, V = 610.78 (2) ų). In this work, the sites occupancy by the K+, Sr2+ and Fe3+ cations on the TTB structure were determined. NbO6 polihedra distortion and its correlation with the theoretical polarization are discussed. (AU)

FAPESP's process: 07/03510-9 - Structural characterization of nanopowders of semiconductor ferroelectric oxides
Grantee:Silvania Lanfredi
Support Opportunities: Regular Research Grants