Abstract
A novel vanadium tellurite V 4Te 4O 18 was synthesized by the hydrothermal reaction of V 2O 5, Na 2TeO 3, CuCl 2·6H 2O, and water. Its structure was determined by elemental analyses, XPS spectra, TG analysis, IR spectrum and the single-crystal X-ray diffraction. The title compound crystallizes in monoclinic system, space group P2(1)/ c, a=7.2475(14) A ̊ , b =9.4901(19) A ̊ , c =10.073(2) A ̊ , β=94.45(3)°, V=690.7(2) A ̊ 3 , Z=2, λ(Mo Kα) =0.71073 A ̊ , ( R( F)=0.0316 for 1580 reflections). Data were collected on a Rigaku R-AXIS RAPID IP diffractometer at 293 K in the range of 2.82< θ<27.47°. The title compound exhibits a novel three-dimensional (3D) framework, formed by VO 6 octahedra, VO 5 square pyramids, TeO 4 folded squares, and TeO 5 square pyramids via the corner- and/or edge-sharing mode. The 3D framework consists of two different types of one-dimensional (1D) tunnels parallel to a-axes.
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