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|Title: ||Synthesis and structural studies of lanthanide substituted bismuth-titanium pyrochlores.|
|Authors: ||Ting, J|
|Keywords: ||Crystal Structure|
|Issue Date: ||Apr-2009|
|Citation: ||Ting, J., Kennedy, B. J., Withers, R. L., & Avdeev, M. (2009). Synthesis and structural studies of lanthanide substituted bismuth-titanium pyrochlores. Journal of Solid State Chemistry, 182(4), 836-840.|
|Abstract: ||The identity of the pyrochlore phase seen during the synthesis of ferroelectric Bi(4-x)Ln(x)Ti(3)O(12) Aurivillius oxides is shown to be Bi(2/3)Ln(4/3)Ti(2)O(7). This pyrochlore is only stable for Ln(3+) = Sm3+ or smaller. For larger lanthanides the layered Aurivillius oxide is favoured. The presence of six-fold disorder, associated with the Bi 6s(2) lone pair electrons, is believed to stabilise the unexpected stoichiometry of this oxide. Precise structures, obtained by Rietveld refinement from synchrotron X-ray diffraction data, of three examples Ln(3+) = Eu, Ho and Yb are presented. © 2009, Elsevier Ltd.|
|Appears in Collections:||Journal Articles|
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