Study of Tantalum Substituted Potassium Tungsten Bronzes

Authors

  • Md Mahbubur R Shakil Department of Chemistry, University of Dhaka, Dhaka-1000
  • Tapas Debnath Department of Chemistry, University of Dhaka, Dhaka-1000
  • Claus H Ruscher Institute for Mineralogy, Leibniz University of Hannover, Callinstraâe 3, D- 30167 Hannover
  • Altaf Hussain Centre for Advanced Research in Sciences, University of Dhaka, Dhaka-1000

DOI:

https://doi.org/10.3329/jbcs.v25i1.11770

Keywords:

Tantalum, Substituted

Abstract

A series of compounds KxTayW1-yO3 with x = 0.30, 0.00 ? y ? 0.30 and x = 0.55, 0.00 ? y ? 0.10 were synthesized by conventional solid-state method. The samples were characterized using XRD and FTIR spectroscopy. X-ray powder patterns reveal that the samples with compositions x = 0.30, y ? 0.30 show hexagonal tungsten bronze (HTB) type phase and the samples with x = 0.55, 0.02 ? y ? 0.10 show a mixture of two phases (K-HTB and tetragonal potassium tungsten bronze, K-TTB). The samples of the system, K0.30TayW1-yO3 with 0.00 ? y ? 0.15 shows no significant change in the cell parameters. However, for the composition y > 0.15, the cell parameter a decreases and c increases with increasing Ta content, which may be  explained by the ordering of Ta for y > 0.15 suggesting the transformation to another  space group. The appearance of absorption peak in the infrared absorption spectra of K0.3TayW1-yO3, y > 0.10 samples indicate the transition to non-metallic phase.

DOI: http://dx.doi.org/10.3329/jbcs.v25i1.11770

Journal of Bangladesh Chemical Society, Vol. 25(1), 38-45, 2012

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Published

2012-09-03

How to Cite

Shakil, M. M. R., Debnath, T., Ruscher, C. H., & Hussain, A. (2012). Study of Tantalum Substituted Potassium Tungsten Bronzes. Journal of the Bangladesh Chemical Society, 25(1), 38–45. https://doi.org/10.3329/jbcs.v25i1.11770

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