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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/4035
Title: Synthesis and characterization of AgBiO3 with the cubic KSbO3 structure
Authors: Sharma R.
Mandal T.K.
Ramesha K.
Gopalakrishnan J.
Published in: Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry
Abstract: AgBiO3, isotypic with cubic (Im-3) KBiO3, has been prepared by K+/Ag+ ion-exchange starting from KBiO 3. 1/3H2O-Rietveld refinement of the structure from powder X-ray diffraction data shows that AgBiO3 [a = 9.7852(2) Ã…; Z = 12; space group Im-3] consists of pairs of edge-shared BiO6 octahedra connected by common comers wherein the Ag+ reside in the tunnels along 〈111〉 direction. The BiO6 octahedra are distorted and the average Bi-O bond distance (2.117 Ã…) is longer than the Bi-O distance (2.099 Ã…) in the parent. In addition, the Ag(2)-O(2) bond distance (2.429 Ã…) is considerably short, signaling covalent interaction between Ag+ and BiO3-framework. These structural changes are reflected in the optical properties as well; while the brick red parent shows an absorption edge corresponding to ∼ 2 eV band gap, black AgBiO3 shows free carrier absorption in the 400-800 nm range. Similar difference is also seen in the IR spectra.
Citation: Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry (2004), 43(1): 11-17
URI: http://repository.iitr.ac.in/handle/123456789/4035
Issue Date: 2004
ISSN: 3764710
Author Scopus IDs: 57196546143
57200780613
6603840554
36794761100
Author Affiliations: Sharma, R., Solid State and Struct. Chem. Unit, Indian Institute of Science, Bangalore 560 012, India
Mandal, T.K., Solid State and Struct. Chem. Unit, Indian Institute of Science, Bangalore 560 012, India
Ramesha, K., Materials Department, University of California, Santa Barbara, CA 93106-5050, United States
Gopalakrishnan, J., Solid State and Struct. Chem. Unit, Indian Institute of Science, Bangalore 560 012, India
Corresponding Author: Gopalakrishnan, J.; Solid State and Struct. Chem. Unit, Indian Institute of Science, Bangalore 560 012, India; email: gopal@sscu.iisc.ernet.in
Appears in Collections:Journal Publications [CY]

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