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This article in SSSAJ

  1. Vol. 35 No. 1, p. 47-54
    Received: July 13, 1970
    Accepted: Oct 13, 1970

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Low-Temperature Phases of Interfacial Water in Clay-Water Systems1

  1. Duwayne M. Anderson and
  2. Allen R. Tice2



Low temperature differential thermal analyses of selected clay-water systems were made to locate important phase change temperatures and to define fruitful temperature-pressure fields for precise calorimetric investigation. In addition to an exotherm corresponding to initial freezing, one, two or three exotherms were observed between −35C and −60C. The low temperature exotherms do not depend critically upon water content, but clearly they are related to clay mineral and exchangeable cation type. The evolution of heat in this temperature range probably corresponds to a phase change in the interfacial water.

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