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Volume 23 - August 1975

Contents

Page 5 of 5

Research Article

  • Variability in Exchange Ion Position in Smectite: Dependence on Interlayer Solvent

  • V. Berkheiser, M. M. Mortland
  • Published online by Cambridge University Press:
    01 July 2024, pp. 404-410
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  • Full and reduced charge smectite saturated with Na(I), Ca(II), Cu(II), or tetralkylammonium ions were swollen by a series of solvents of various bulk physical properties. In the full charge smectites, swelling occurred in all solvents regardless of the exchange ion or the initial water content. Charge differences did not usually result in differential swelling of the smectite. Little correlation was found between the degree of swelling and the Gutmann donor numbers, bulk dielectric constants, bulk surface tensions, or dipole moments of the solvents. The intensities of the high field Fe(III) resonance (g = 3.6) in the esr spectra of full charge smectite swollen in various solvents reflected variability in exchange ion positions and depended upon the Gutmann donor number of the solvent. Considerable variety in the stereochemistry of Cu(II)-solvent complexes was revealed by esr spectra of the swollen systems.

Notes

  • Exchange Ion Positions in Smectite: Effects on Electron Spin Resonance of Structural Iron

  • M. B. McBride, M. M. Mortland, T. J. Pinnavaia
  • Published online by Cambridge University Press:
    01 July 2024, pp. 162-164
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Note

  • Sepiolite Anhydride and Crystal Folding

  • C. Serna, J. L. Ahlrichs, J. M. Serratosa
  • Published online by Cambridge University Press:
    01 July 2024, pp. 411-412
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Meeting Report

  • Meeting of the Nomenclature Committee of A.I.P.E.A.: Association Internationale pour l’Etude des Argiles

  • G. W. Brindley, G. Pedro
  • Published online by Cambridge University Press:
    01 July 2024, pp. 413-414
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Correction

  • Erratum to: Influence of Citric Acid on the Crystallization of Aluminum Hydroxide

  • K. F. Ng. Kee Kwong, P. M. Huang
  • Published online by Cambridge University Press:
    01 July 2024, p. 164
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Notes

  • Influence of Citric Acid on the Crystallization of Aluminum Hydroxides

  • K. F. Ng. Kee Kwong, P. M. Huang
  • Published online by Cambridge University Press:
    01 July 2024, pp. 164-165
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News

  • News

  • Published online by Cambridge University Press:
    01 July 2024, pp. 415-416
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Notes

  • Interlayer Bonding in Talc and Pyrophyllite

  • R. F. Giese, Jr.
  • Published online by Cambridge University Press:
    01 July 2024, pp. 165-166
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Announcement

  • Announcement

  • Published online by Cambridge University Press:
    01 July 2024, p. 167
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Announcement

  • News

  • Published online by Cambridge University Press:
    01 July 2024, p. 167
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Page 5 of 5