Low- and high-temperature heat capacity of metallic technetium

J. N. Zappey, E. E. Moore, O. Beneš*, J. C. Griveau, R. J.M. Konings

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The heat capacity of technetium metal has been measured from 2.1 K to 293 K using relaxation calorimetry and the enthalpy increment up to 1700 K using drop calorimetry. The low-temperature calorimetry measurements revealed a superconducting transition temperature of TC = (7.76 ± 0.08) K. The zero-degree Debye temperature(θE) and the electronic heat capacity coefficient (γe) of the normal state were derived as (307 ± 5) K and (4.22 ± 0.20) mJ·K−2·mol−1, respectively. The standard entropy of the superconducting standard state was derived as Sm° (298.15) = (36.8 ± 1.3) J·K−1·mol−1. The fitting of enthalpy-increment data together with high-temperature heat capacity data reported in literature yielded a heat capacity equation up to 1700 K.

Original languageEnglish
Article number107200
Number of pages7
JournalJournal of Chemical Thermodynamics
Volume189
DOIs
Publication statusPublished - 2024

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Calorimetry
  • Enthalpy
  • Fission product
  • Heat capacity
  • Technetium

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