Asymmetric cationic coordination environments in new oxide materials: synthesis and characterization of Pb(4)Te(6)M(10)O(41) (M = Nb(5+) or Ta(5+))

Inorganic Chemistry
Kang Min Ok, P Shiv Halasyamani

Abstract

Two new isostructural tellurites, Pb(4)Te(6)M(10)O(41) (M = Nb(5+) or Ta(5+)), have been synthesized by standard solid-state techniques using PbO, Nb(2)O(5) (or Ta(2)O(5)), and TeO(2) as reagents. The structures of Pb(4)Te(6)Nb(10)O(41) and Pb(4)Te(6)Ta(10)O(41) were determined by single-crystal and powder X-ray diffraction. The materials exhibit a three-dimensional framework consisting of layers of corner-shared NbO(6) octahedra connected by TeO(3) and PbO(6) polyhedra. The Nb(5+), Te(4+), and Pb(2+) cations are in asymmetric coordination environments attributable to second-order Jahn-Teller effects. The Nb(5+) cations undergo an intraoctahedral distortion either toward a face or a corner, whereas the Te(4+) and Pb(2+) cations are in distorted environments attributable to their lone pair. In addition, the TeO(3) polyhedra strongly influence the direction of the Nb(5+) intraoctahedral distortion. Infrared and Raman spectroscopy, thermogravimetric analysis, and dielectric measurements are also presented. Crystal data: Pb(4)Te(6)Nb(10)O(41), monoclinic, space group C2/m (No. 12), with a = 23.412(3) A, b = 20.114(3) A, c = 7.5008(10) A, beta = 99.630(4) degrees, V = 3482.4(8) A(3), and Z = 4; Pb(4)Te(6)Ta(10)O(41), monoclinic, spa...Continue Reading

References

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Citations

Oct 30, 2015·Inorganic Chemistry·Xue-Li CaoJiang-Gao Mao
May 29, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Xue-Li CaoJiang-Gao Mao
Dec 12, 2007·Chemistry : a European Journal·Hai-Long JiangWen-Dan Cheng
Aug 10, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·George I ChilasThemistoklis Kabanos
Nov 3, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Pei-Xin LiJiang-Gao Mao
Dec 22, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Pei-Xin Li, Jiang-Gao Mao
Mar 23, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Fang KongJiang-Gao Mao
Aug 8, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Fang KongJiang-Gao Mao
Feb 5, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Qian-Hua GuJiang-Gao Mao
Jan 27, 2012·Dalton Transactions : an International Journal of Inorganic Chemistry·Seung-Jin OhKang Min Ok
May 29, 2010·Inorganic Chemistry·Fang KongJiang-Gao Mao
Jun 10, 2010·Inorganic Chemistry·Pei-Xin LiJiang-Gao Mao
Jun 24, 2009·Journal of the American Chemical Society·Chuan-Fu SunJiang-Gao Mao
Jul 13, 2007·Inorganic Chemistry·Hai-Long JiangJiang-Gao Mao
May 13, 2010·Inorganic Chemistry·Kelvin B ChangAlexander J Norquist
Nov 17, 2010·Inorganic Chemistry·Fang KongJiang-Gao Mao
Aug 8, 2014·Inorganic Chemistry·Jian LinThomas E Albrecht-Schmitt
Jun 15, 2006·Journal of the American Chemical Society·Fang KongWen-Dan Cheng

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