The magnetic transition, heat capacity, and thermodynamic properties of uranium dioxide from 5 to 350 K

James Huntzicker, Edgar F. Westrum

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

The heat capacity of high purity uranium dioxide has been re-examined over the low-temperature range especially in the vicinity of the λ-type anomaly reported to occur at 28·7 K as a consequence of magnetic ordering. The present study indicates a very sharp transition at 30·44 K with a maximum Cp of 391 cal mol-1 K-1. The heat capacity at constant pressure Cp, the entropy S°, the enthalpy (H° - H°0), and Gibbs energy function (G° - H°)/T are tabulated and at 298.15 K have the following values: 15.20 cal mol-1 K-1, 18.41 cal mol-1 K-1, 2696 cal mol-1 K-1, and -9.37 cal mol-1 K-1. The heat capacity results are compared with those derived from the neutron scattering work and also with the theory of Allen.

Original languageEnglish (US)
Pages (from-to)61-76
Number of pages16
JournalThe Journal of Chemical Thermodynamics
Volume3
Issue number1
DOIs
StatePublished - 1971
Externally publishedYes

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Uranium dioxide
dioxides
uranium
Specific heat
Thermodynamic properties
thermodynamic properties
specific heat
Gibbs free energy
Neutron scattering
Enthalpy
Magnetization
purity
neutron scattering
Entropy
enthalpy
entropy
anomalies
uranium dioxide
Temperature
energy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

The magnetic transition, heat capacity, and thermodynamic properties of uranium dioxide from 5 to 350 K. / Huntzicker, James; Westrum, Edgar F.

In: The Journal of Chemical Thermodynamics, Vol. 3, No. 1, 1971, p. 61-76.

Research output: Contribution to journalArticle

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