Synthesis and structure of A_4V_6[Te_2~(4+)Te~(6+)]O_(24) (A = K, Rb) - Two new quaternary mixed-valent tellurium oxides

Zhu T.; Qin J.; Halasyamani P.S.

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Synthesis and structure of A_4V_6[Te_2~(4+)Te~(6+)]O_(24) (A = K, Rb) - Two new quaternary mixed-valent tellurium oxides

机译：A_4V_6 [Te_2〜（4+）Te〜（6 +）] O_（24）（A = K，Rb）-两种新型四价混合碲氧化物的合成与结构

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Two new mixed-valent tellurium oxides with vanadium(v), A_4V _6[Te_2~(4+)Te~(6+)]O_(24) (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 [V_6Te_3O_(24)] ~(4-) anionic units. In these anionic structural units, a Te ~(6+)O_6 octahedron is connected to six VO_4 tetrahedra by corner-sharing to generate a [V_6TeO_(24)] unit, and each of these [V_6TeO_(24)] units are interconnected by sharing two Te~(4+)O_3 polyhedra to complete the infinite [V_6Te_3O_(24)]~(4-) sheets. Infrared spectroscopy, UV-Visible diffuse reflectance spectroscopy, and thermogravimetric analysis were also performed on these two compounds. Crystal data: K _4V_6Te_3O_(24), trigonal, space group R3c (No. 167) with a = b = 9.7075(6) ?, c = 42.701(3) ?, V = 3484.9(4) ?~3, and Z = 6; Rb_4V_6Te_3O _(24), trigonal, space group R3c (No. 167) with a = b = 9.8399(9) ?, c = 43.012(4) ?, V = 3606.6(6) ?~3, and Z = 6.

机译：通过水热和常规固态合成了两种新的钒（v）混合价碲氧化物A_4V _6 [Te_2〜（4+）Te〜（6 +）] O_（24）（A = K和Rb）技术。通过单晶X射线衍射分析确定它们的结构。这两个同构化合物表现出由[V_6Te_3O_（24）]〜（4-）阴离子单元组成的分层结构拓扑。在这些阴离子结构单元中，通过角共享将Te〜（6+）O_6八面体连接到六个VO_4四面体以生成[V_6TeO_（24）]单元，并且这些[V_6TeO_（24）]单元中的每一个通过共享两个Te〜（4+）O_3多面体以完成无限的[V_6Te_3O_（24）]〜（4-）张。还对这两种化合物进行了红外光谱，紫外可见漫反射光谱和热重分析。晶体数据：K _4V_6Te_3O_（24），三角形，空间组R3c（编号167），其中a = b = 9.7075（6）？，c = 42.701（3）？，V = 3484.9（4）？〜3，和Z = 6; Rb_4V_6Te_3O _（24），三角形，空间组R3c（编号167），其中a = b = 9.8399（9）？，c = 43.012（4）？，V = 3606.6（6）？〜3，Z = 6。

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《Dalton transactions: An international journal of inorganic chemistry》 |2011年第34期|共6页
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Zhu T.; Qin J.; Halasyamani P.S.;
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Synthesis and structure of A_4V_6[Te_2~(4+)Te~(6+)]O_(24) (A = K, Rb) - Two new quaternary mixed-valent tellurium oxides

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