Crystal structure and ionic conductivity of a new bismuth tungstate, Bi3W2O10.5 |
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| Authors: | B Muktha and T N Guru Row |
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| Institution: | (1) Solid State and Structural Chemistry Unit, Indian Institute of Science, 560 012 Bangalore |
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| Abstract: | The compound Bi3W2O10.5 was synthesized by the solid-state technique from Bi2O3 and WO3 in stoichiometric quantities. Single crystals were grown by the melt-cooling technique and the crystal structure was solved
in the tetragonalI4/m space group witha = 3.839 (1) ?,c = 16.382 (5) ?,V = 241.4 (1) ?3,Z = 4 and was refined to anR index of 0.0672. The structure represents a modification of the Aurivillius phase and consists of Bi2O2]2+ units separated by WO8 polyhedra. a.c. impedance studies indicate oxide ion conductivity of 2.91 10−5 Scm−1 at 600°C.
Dedicated to Prof J Gopalakrishnan on his 62nd birthday. |
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| Keywords: | Bismuth tungstate single crystal X-ray diffraction a c impedance oxide ion conductivity |
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