Structural Behaviour of the Mixed-Layer Aurivillius-Phase Bi7Ti4NbO21
β Scribed by BOULLAY, PHILIPPE; MERCURIO, DANIELE
- Book ID
- 115494214
- Publisher
- Taylor and Francis Group
- Year
- 2004
- Tongue
- English
- Weight
- 753 KB
- Volume
- 62
- Category
- Article
- ISSN
- 1058-4587
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π SIMILAR VOLUMES
Rietveld refinement of powder neutron diffraction data has been used to study the crystal structures of the four-layer Aurivillius-phase ferroelectrics Bi 5 Ti 3 FeO 15 (at 251C) and SrBi 4 Ti 4 O 15 (at a series of temperatures up to 8001C). At 251C both materials adopt the polar orthorhombic space
In part I of this paper, a generalized structural model of Aurivillius-type compounds has been presented using a 4D superspace group analysis where Aurivillius structures are considered as cation-deficient perovskites with the general formula AB 1Γx O 3 . Being essentially composition independent, t