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Revisiting the thermophysical properties of the A-type hexagonal lanthanide sesquioxides between temperatures of 5 K and 1000 K

✍ Scribed by John B. Gruber; Bruce H. Justice; Edgar F. Westrum; Jr; Bahram Zandi

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 211 KB
Volume: 34
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.2001.0860

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✦ Synopsis

Thermal measurements of the heat capacities and sensible enthalpies of the hexagonal (A-type) lanthanide sesquioxides of La, Ce, Pr, and Nd are reviewed and re-evaluated in terms of the lattice heat-capacity parameters and the Schottky levels obtained from lattice-sum calculations and analyses of the optical spectra. Re-examination of all the data typically from about T = 5 K to 1000 K leads to revised values for the thermodynamic functions over this temperature range. Of particular interest, the values of 298 0 S o m /R at

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