Measurements of the Standard Entropy of Formation of Clay Minerals
- Javier M. Santillan-Medrano and
- Hinrich L. Bohn
The standard entropies of several clays were determined by calorimetry. The entropies of kaolinite and halloysite, 0.197 and 0.185 cal/g (50.8 and 47.7 cal/mole), respectively, compared well to literature values. The entropies of 2:1 layer-lattice aluminosilicate clay minerals were within the range of 0.15 to 0.16 cal/g. The results for the 2:1 clays are considered questionable because of the problem of low thermal conductivity of these minerals. Problems of calorimetric measurements of clay minerals are discussed.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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