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Issue 34, 2011
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Synthesis and structure of A4V6[Te24+Te6+]O24 (A = K, Rb)—two new quaternary mixed-valent tellurium oxides

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Abstract

Two new mixed-valent tellurium oxides with vanadium(V), A4V6[Te24+Te6+]O24 (A = K and Rb), have been synthesized by hydrothermal and conventional solid state techniques. Their structures were determined by single-crystal X-ray diffraction analysis. These two iso-structural compounds exhibit layered structural topologies consisting of [V6Te3O24]4− anionic units. In these anionic structural units, a Te6+O6 octahedron is connected to six VO4 tetrahedra by corner-sharing to generate a [V6TeO24] unit, and each of these [V6TeO24] units are interconnected by sharing two Te4+O3 polyhedra to complete the infinite [V6Te3O24]4− sheets. Infrared spectroscopy, UV-Visible diffuse reflectance spectroscopy, and thermogravimetric analysis were also performed on these two compounds. Crystal data: K4V6Te3O24, trigonal, space group R[3 with combining macron]c (No. 167) with a = b = 9.7075(6) Å, c = 42.701(3) Å, V = 3484.9(4) Å3, and Z = 6; Rb4V6Te3O24, trigonal, space group R[3 with combining macron]c (No. 167) with a = b = 9.8399(9) Å, c = 43.012(4) Å, V = 3606.6(6) Å3, and Z = 6.

Graphical abstract: Synthesis and structure of A4V6[Te24+Te6+]O24 (A = K, Rb)—two new quaternary mixed-valent tellurium oxides

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Publication details

The article was received on 30 Mar 2011, accepted on 12 May 2011 and first published on 22 Jun 2011


Article type: Paper
DOI: 10.1039/C1DT10538H
Citation: Dalton Trans., 2011,40, 8527-8532
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    Synthesis and structure of A4V6[Te24+Te6+]O24 (A = K, Rb)—two new quaternary mixed-valent tellurium oxides

    T. Zhu, J. Qin and P. S. Halasyamani, Dalton Trans., 2011, 40, 8527
    DOI: 10.1039/C1DT10538H

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