Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 70: Issue 2

Thermophysical Properties of CeB6 and PrB6 at subambient temperatures

Authors:
,
E. Westrum University of Michigan Department of Chemistry Ann Arbor MI 48109-1055 USA Ann Arbor MI 48109-1055 USA

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B. Justice University of Michigan Department of Chemistry Ann Arbor MI 48109-1055 USA Ann Arbor MI 48109-1055 USA

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H. Clever University of Michigan Department of Chemistry Ann Arbor MI 48109-1055 USA Ann Arbor MI 48109-1055 USA

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D. Johnson University of Michigan Department of Chemistry Ann Arbor MI 48109-1055 USA Ann Arbor MI 48109-1055 USA

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Pages:
361–369
Online Publication Date:
01 Nov 2004
Publication Date:
01 Sep 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1021603902927
Keywords:
heat capacity; entropy; hexaborides; lanthanide metals; thermophysics; transitions
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Abstract  

Equilibrium adiabatic heat-capacity measurements have been made on zone refined samples of CeB6 and PrB6. Companion measurements made on LaB6, NdB6, and GdB6 have been reported elsewhere. These show cooperative lambda-type anomalies associated with antiferro-magnetic ordering. Except for lanthanum hexaboride, Schottky internal crystal field levels result in significant contributions to the thermodynamic functions. The gross thermodynamic properties at 298.15 K heat capacity (Cp/R), entropy increment (ΔT0,mS0/R), and Gibbs energy function are correlated with the nature of the lanthanide. For LaB6, CeB6, PrB6, NdB6, and GdB6 the three properties are, respectively: {11.654, 12.014, 11.997, 11.916, 11.695} Cp/R; {10.001, 11.803, 12.430, 12.558, 13.982} S0/R, and finally {4.379, 5.912, 6.232, 6.451, 7.905}Φ0m/R.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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