Syntheses and Characterization of AM(2)V(2)O(11) (A = Ba, Sr, Pb; M = Nb, Ta) Vanadates with Centrosymmetric and Noncentrosymmetric Structures

Paidi, Anil Kumar and Jaschin, P W and Varma, K B R and Vidyasagar, Kanamaluru (2017) Syntheses and Characterization of AM(2)V(2)O(11) (A = Ba, Sr, Pb; M = Nb, Ta) Vanadates with Centrosymmetric and Noncentrosymmetric Structures. In: INORGANIC CHEMISTRY, 56 (20). pp. 12631-12640.

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Abstract

Five isomorphous AM(2)V(2)O(11) vanadates of niobium and tantalum, namely, BaNb2V2O11, BaTa2V2O11, SrNb2V2O11, SrTa2V2O11, and PbTa(2)V(2)Q(11), were prepared by solid-state reactions and structurally characterized by single crystal and powder X-ray diffraction techniques. Barium and strontium compounds, respectively, have centrosymmetric and noncentrosymmetric types of layered structure, wherein M2V2O11](2-) anionic layers are interleaved with A(2+) cations. Both types of layered structure are found for lead compound. The strontium and lead compounds are type I phase-matching materials with second-harmonic-generating efficiencies of 33-50% of LiNbO3, and their dielectric properties were evaluated. A three-dimensional structural variant was.also identified for strontium compounds, which crystallize in noncentrosymmetric orthorhombic space group C222(1).

Item Type:	Journal Article
Publication:	INORGANIC CHEMISTRY
Additional Information:	Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	11 Nov 2017 07:09
Last Modified:	11 Nov 2017 07:09
URI:	http://eprints.iisc.ac.in/id/eprint/58201

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