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Published on: January 3, 2016
Incommensurate structure of InAl1 - xTixO3 + x/2[x = 0.701 (1)]: comparison between modulated and composite models
P J Bereciartua1, F J Zuñiga, T Breczewski
1Department of Condensed Matter Physics, University of the Basque Country, Aptdo 644, Bilbao, Spain. pjbereciartu001@ehu.es
Abstract:
The structure of the monoclinic phase of the compound InAl(1 - x)Ti(x)O(3 + x/2) with x = 0.701 (1) has been analyzed within the (3 + 1)-dimensional superspace formalism. Two different models were refined describing the structure as an incommensurate modulated layer and modulated composite, respectively. Both models include the same composition-structure relation. In the composite approach it is derived from the mismatching between the two subsystems. In the incommensurate modulated system, it is derived from a closeness condition between O atomic domains. The distribution and coordination of the cations is discussed and compared with previously proposed models for similar compounds.
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