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Heat capacities of kaolinite from 7 to 380 K and of DMSO- intercalated kaolinite from 20 to 310 K. The entropy of kaolinite Al2Si2O5(OH)4

Clays and Clay Minerals

By:
and
https://doi.org/10.1346/CCMN.1991.0390404

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Abstract

The heat capacities of kaolinite (7 to 380 K) and of dimethyl sulfoxide (DMSO) intercalated kaolinite (20 to 310 K) were measured by adiabatically shielded calorimetry. The third law entropy of kaolinite, S°298, is 200.9 ± 0.5 J mol-1 K-1.

The "melting point" of the DMSO in the intercalate, 288.0 ± 0.2 K, is 3.7 K lower than that of pure DMSO, 291.67 K. The heat capacity of DMSO in the intercalate above 290 K is approximately 5.2 J mol-1 K-1 smaller than that of pure liquid DMSO at the same temperature.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Heat capacities of kaolinite from 7 to 380 K and of DMSO- intercalated kaolinite from 20 to 310 K. The entropy of kaolinite Al2Si2O5(OH)4
Series title:
Clays and Clay Minerals
DOI:
10.1346/CCMN.1991.0390404
Volume:
39
Issue:
4
Year Published:
1991
Language:
English
Publisher:
The Clay Minerals Society
Description:
7 p.
First page:
362
Last page:
368