Synthesis and structure of some interesting oxides of bismuth

Gopalakrishnan, J. (1986) Synthesis and structure of some interesting oxides of bismuth Proceedings of the Indian Academy of Sciences - Chemical Sciences, 96 (6). pp. 449-458. ISSN 0253-4134

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Synthesis and structures of several new oxides containing bismuth are described. Three types of structures are common among the multinary oxides containing trivalent bismuth. They are the sillenite structure of γ -Bi2O3, the layered perovskite structure of Aurivillius phases and the pyrochlore structure. The influence of Bi3+:6s2 lone pair electrons is seen in all the three structures. In transition metal oxides containing trivalent bismuth,d o cations (Ti4+, Nb5+, W6+) stabilize the layered perovskite structure, while cations containing partially-filledd orbitals (V4+, Cr3+, Fe3+) favour pyrochlore-related structures. Ferroelectric distortion of MO6 octahedra of thed o cations seems to play an important role in stabilizing layered perovskite structures.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Bismuth Oxides; Synthesis; Structures; Sillenites; Aurivillius (layered Perovskite) Phases; Pyrochlores
ID Code:84372
Deposited On:25 Feb 2012 05:44
Last Modified:19 May 2016 00:50

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