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Standard Gibbs energies of formation of M2TeO6 (s) (M = Eu, Dy, Yb)

Authors
  • Jain, Ashish1
  • Pankajavalli, R.1
  • Anthonysamy, S.1
  • 1 Indira Gandhi Centre for Atomic Research, Chemistry Group, Kalpakkam, 603102, India , Kalpakkam (India)
Type
Published Article
Journal
Journal of Thermal Analysis and Calorimetry
Publisher
Springer Netherlands
Publication Date
Sep 07, 2014
Volume
119
Issue
1
Pages
689–693
Identifiers
DOI: 10.1007/s10973-014-4079-6
Source
Springer Nature
Keywords
License
Yellow

Abstract

The standard Gibbs energies of formation of M2TeO6 (where M: Eu, Dy, Yb) were obtained from vapour pressure measurements. The vapour pressures of TeO2 (g) were measured by employing thermogravimetry-based transpiration technique. The temperature dependence of the vapour pressure of TeO2 (g) over the mixtures M2TeO6 (s) + M2O3 (s), generated by the incongruent vapourisation reaction, M2TeO6 (s) → M2O3 (s) + TeO2 (g) + ½ O2 (g) was measured in the temperature range 1,368–1,483 K (M: Eu), 1,313–1,473 K (M: Dy), and 1,283–1,413 K (M: Yb) to obtain the Gibbs energies of formation of Eu2TeO6 (s), Dy2TeO6 (s), and Yb2TeO6 (s), respectively.

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