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DTA studies on the effect of impurities on the phase transformations of barium carbonate

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Abstract

Orthorhombic (π) barium carbonate, undergoes a reversible transformation to hexagonal (β) form around 1093 K which in turn undergoes a reversible transformation to cubic (α) form around 1253 K. Cationic impurities such as Ca2+, Sr2+, Cd2+, Zn2+, have been doped in pure barium carbonate and their effect on the kinetics and energetics of its transformations were studied. By using DTA technique, the enthalpy and energy of activation for the transformation of pure and doped samples of barium carbonate have been calculated and compared.

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Authors and Affiliations

  1. Department of Chemistry, University of Roorkee, 247672, Roorkee, India

    C. Rama Mohan Rao & P. Narain Mehrotra

Authors
  1. C. Rama Mohan Rao
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  2. P. Narain Mehrotra
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Additional information

One of the authors (C. R. M. Rao) thanks the University Grants Commission, New Delhi (India), for the award of a research scholarship. The authors are grateful to Dr. I. P. Saraswat, Head of the Chemistry department, for providing the research facilities.

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Rao, C.R.M., Mehrotra, P.N. DTA studies on the effect of impurities on the phase transformations of barium carbonate. Journal of Thermal Analysis 17, 539–542 (1979). https://doi.org/10.1007/BF01914043

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  • DOI: https://doi.org/10.1007/BF01914043

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