Superspace Description of the System Bi2(n+2)MonO6(n+1) (n=3, 4, 5 and 6)
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The system Bi2(n+2)Mo n O6(n+1) is described with the superspace formalism. Considering the cationic distribution of the member with n=3, a superspace model is constructed beginning with a model previously proposed for the compound Bi2MoO6. The description of even members requires additional modifications. As a result, two superspace models are proposed for the different members of this system, depending on the parity of the parameter n. Both models have been checked through the Rietveld method combining synchrotron and neutron powder diffraction data.
KeywordsCationic Distribution Rietveld Method Modulation Vector Aurivillius Phase Superspace Formalism
The authors are grateful to J. Galy, A.R. Landa-Cánovas and J. Hernández-Velasco for their helpful discussions. This work was supported by the Basque Government (project IT-282-07). This work was also supported by the European Community—Research Infrastructure Action under the FP6: “Structuring the European Research Area” (“Integrating Activity on Synchrotron and Free Electron Laser Science” (IA-SFS) RII3-CT-2004-506008). PJB also thanks Basque Government for financial support. Adapted from  with permission of the IUCr.