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5 results

  • One-Dimensional Neutron Diffraction Study of a Vermiculite

  • J. M. Adams, C. Riekel
  • Journal:
    Clays and Clay Minerals / Volume 28 / Issue 6 / December 1980
    Published online by Cambridge University Press:
    01 July 2024, pp. 444-445
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  • The Diffusion of Interlamellar Water in the 23.3 Å Na-Montmorillonite:Pyridine/H2O Intercalate by Quasielastic Neutron Scattering

  • J. M. Adams, C. Breen, C. Riekel
  • Journal:
    Clays and Clay Minerals / Volume 27 / Issue 2 / April 1979
    Published online by Cambridge University Press:
    01 July 2024, pp. 140-144
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  • The diffusion of water in the title intercalate has been measured by quasielastic neutron scattering. The diffusion coefficient (6.1 × 10−7 cm2 s−1 at 23.5°C) is one order less than that found previously for a sodium-exchanged montmorillonite which, however, contained 4 times as much water in the interlamellar space. The activation energy for the motion has been deduced to be 18 kJ mol−1. Also it has been demonstrated that upon the time scale of the neutron scattering events (faster than 10−9 s) the hydroxyl groups of the clay lattice are not in motion.