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Volume 27 - June 1979

Contents

Page 4 of 4

Other

  • Complex Acids and their Role in the Stability of Clay Sludges from Oil Sands

  • M. A. Kessick
  • Published online by Cambridge University Press:
    01 July 2024, pp. 301-302
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Book Review

Research Article

  • Water Vapor Isotherms and Heat of Immersion of Na/Ca-Montmorillonite Systems—II: Mixed Systems

  • R. Keren, I. Shainberg
  • Published online by Cambridge University Press:
    01 July 2024, pp. 145-151
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  • Adsorption isotherms for water vapor, c-spacing and heat of immersion in water of mixed Na/Ca-montmorillonite were measured at 25°C at various RH. There was good agreement between the calorimetric data, the heat calculated from the isotherms by use of BET equation, and the calculations from the ion-dipole model. It was concluded that the electrostatic forces between the adsorbed cations and the water molecules are the dominant forces in the hydration of the clay. Thus, at low moisture content, only the adsorbed Ca-ions are hydrated. The heat released when Na-platelets condense to form Ca-packets was measured, and it was suggested that this energy term is the driving force for the demixing phenomena.

Book Reviews

Other

  • The Effect of Hydroxy-Aluminum Precipitation on the Exchange Properties of Montmorillonite

  • R. Keren
  • Published online by Cambridge University Press:
    01 July 2024, pp. 303-304
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Book Reviews

Discussion

  • Quantitative Analysis of Elements in Sediments and Soils by X-Ray Fluorescence: A Discussion

  • V. Subramanian
  • Published online by Cambridge University Press:
    01 July 2024, p. 305
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Notes

  • A Metal-Membrane Mount for X-ray Powder Diffraction

  • Lawrence J. Poppe, John C. Hathaway
  • Published online by Cambridge University Press:
    01 July 2024, pp. 152-153
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  • Formation Conditions of Authigenic Kaolinite and Calcite in Coals by Stable Isotope Determinations

  • Yuch-Ning Shieh, Terri G. Suter
  • Published online by Cambridge University Press:
    01 July 2024, pp. 154-156
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Reply

  • Quantitative Analysis of Elements in Sediments and Soils by X-Ray Fluorescence: A Reply

  • E. R. Tuncer, T. Demirel, R. A. Lohnes
  • Published online by Cambridge University Press:
    01 July 2024, p. 306
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Other

  • Distinguished Member Award

  • Published online by Cambridge University Press:
    01 July 2024, pp. 157-159
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  • Distinguished Member Award

  • Published online by Cambridge University Press:
    01 July 2024, pp. 307-308
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Book Review

Announcement

  • Announcement

  • Published online by Cambridge University Press:
    01 July 2024, p. 160
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Book Review

Other

  • Announcements

  • Published online by Cambridge University Press:
    01 July 2024, p. 310
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Page 4 of 4