Skip to main content Accessibility help

We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

Close cookie message
×
  1. Home
  2. Journals
  3. Clay Minerals
  4. Volume 27
Journal Home
Refine listing

Refine listing

Access:
Publication date:

Actions for selected content:

Select all | Deselect all
  • View selected items
  • Export citations
  • Download PDF (zip)
  • Save to Kindle
  • Save to Dropbox
  • Save to Google Drive

Save Search

You can save your searches here and later view and run them again in "My saved searches".

Please provide a title, maximum of 40 characters.
Cancel
×

Volume 27 - December 1992

Contents

Page 3 of 4

Notes

Research Article

  • Stereoselectivity of montmorillonite in the adsorption and deamination of some amino acids

  • B. Siffert, A. Naidja
  • Published online by Cambridge University Press:
    09 July 2018, pp. 109-118

  • Optical isomers deamination of L- and D-glutamic and aspartic amino acids and of their DL racemic mixtures has been achieved in the presence of Na-montmorillonite at pH = 6 and room temperature. The adsorption curves showed that the enantiomer adsorbed depends on the type of amino acid. Nevertheless, deamination reaction kinetics brought about a stereoselectivity of the clay mineral for the L-isomer and implicitly showed an unquestionable “structural chirality character” of the clay mineral.

  • Synthesis of zeolites from thermally activated kaolinite. Some observations on nucleation and growth

  • M. Murat, A. Amokrane, J. P. Bastide, L. Montanaro
  • Published online by Cambridge University Press:
    09 July 2018, pp. 119-130

  • Depending on the preparation temperature and the origin of the raw mineral, the products obtained by thermal activation of kaolinite lead, by hydrothermal treatment with sodium hydroxide at 102°C, either to zeolite 4A, or to cubic zeolite P, or to a mixture of cubic and tetragonal zeolite P. The change in the type of zeolite obtained was explained on the basis of a radical change of the zeolite nucleation process due to either the presence of soluble potassium or high silica content resulting from dehydration of muscovite (an impurity in the raw-kaolinite), or from “segregation” associated with the first step of the metakaolinite to mullite transformation. These phenomena occur at a lower calcination temperature with poorly-crystallized kaolinite, and iron in such a sample promotes a sensitive decrease in the formation rate of zeolite crystals. Such results could be used to characterize the crystallinity of kaolinites.

Book Reviews

Notes

Book Review

Book Reviews

Other

Notes

Book Reviews

Front matter

  • CLM volume 27 issue 2 Cover and Front matter

  • Published online by Cambridge University Press:
    09 July 2018, p. f1
    • Article
      • You have access
    • PDF
    • Export citation

Book Reviews

Other

Book Reviews

Other

Page 3 of 4