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 language | English (US) |
|---|---|
| Pages (from-to) | 61-76 |
| Number of pages | 16 |
| Journal | The Journal of Chemical Thermodynamics |
| Volume | 3 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1971 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - The magnetic transition, heat capacity, and thermodynamic properties of uranium dioxide from 5 to 350 K
AU - Huntzicker, James
AU - Westrum, Edgar F.
PY - 1971
Y1 - 1971
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0006668954&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0006668954&partnerID=8YFLogxK
U2 - 10.1016/S0021-9614(71)80067-8
DO - 10.1016/S0021-9614(71)80067-8
M3 - Article
VL - 3
SP - 61
EP - 76
JO - Journal of Chemical Thermodynamics
JF - Journal of Chemical Thermodynamics
SN - 0021-9614
IS - 1
ER -