Advantages to conversion of lattice heat capacity to CV in the resolution of excess properties -: The Ln2S3's as an example

被引：3

作者：

Demlow, AR

Eldred, DV

Johnson, DA

Westrum, EF

机构：

[1] Cornell Univ, Dept Math, Ithaca, NY 14853 USA

[2] Spring Arbor Coll, Dept Chem, Spring Arbor, MI 49283 USA

[3] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 1998年 / 52卷 / 03期

关键词：

C-p; C-v; entropies; Ln(2)S(3); phonon dispersion;

D O I：

10.1023/A:1010153110658

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper represents a fitting (modeling) of the temperature dependence of the Komada-Westrum characteristic temperature for those gamma-, delta- and epsilon-phase lanthanide sesquisulfides for which the total heat capacities, including internal degrees of freedom (e.g., Schottky and magnetic contributions), were connected to the residue of only lattice vibrations yielding lattice heat-capacity contributions. These characteristic temperatures (theta(KW),) at 298.15 K are seen to behave smoothly (nearly linearly) as a function of (cationic) atomic number within the region of stability of each phase as does the density. The trends between the phases also show some consistency but not predictability of one from the other.

引用

页码：1055 / 1062

页数：8

共 13 条

[1]

BURRIEL R, 1998, UNPUB J CHEM PHYS

[2]

COCHRAN W, 1973, DYNAMICS ATOMS SOLID

[3]

DEMLOW AR, 1996, THESIS SPRING ARBOR, P31

[4] THERMOPHYSICAL PROPERTIES OF THE LANTHANIDE SESQUISULFIDES .4. SCHOTTKY CONTRIBUTIONS, MAGNETIC, AND ELECTRONIC-PROPERTIES OF EPSILON-PHASE YB2S3 AND LU2S3 [J].