Cation Disorder in Pb-Doped SrBi2Nb2O9

Cation disorder in Pb1 - x Sr x Bi2Nb2O9 has been studied using a combination of powder synchrotron X-ray and neutron diffraction methods. The oxides all adopt an orthorhombic structure, space group A21 am in which the A-type cations, Sr and Pb, are disordered over the Bi2O2 and perovskite layers. A...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Chemistry of materials 2001-12, Vol.13 (12), p.4612-4617
Hauptverfasser:	Kennedy, Brendan J, Hunter, Brett A
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Inorganic compounds Physics Structure of solids and liquids crystallography Structure of specific crystalline solids Water, oxides, hydroxides, peroxides
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Cation disorder in Pb1 - x Sr x Bi2Nb2O9 has been studied using a combination of powder synchrotron X-ray and neutron diffraction methods. The oxides all adopt an orthorhombic structure, space group A21 am in which the A-type cations, Sr and Pb, are disordered over the Bi2O2 and perovskite layers. Although the Pb shows a marked preference for the Bi2O2 layers, relative to that of Sr, there are still appreciable amounts of Sr present in the Bi2O2 layers. This is discussed in terms of local bonding effects and bond valence sum analysis.
ISSN:	0897-4756 1520-5002
DOI:	10.1021/cm010327e