New data on the kaolinite-potassium acetate complex

  • Cruz M
  • Duro F
  • 11

    Readers

    Mendeley users who have this article in their library.
  • 16

    Citations

    Citations of this article.

Abstract

The intercalation complex of kaolinite and potassium acetate (KAc) was studied by HTXRD, IR spectroscopy and DTA-TG. The HTXRD patterns indicate that the 14.06 Aa basal spacing of the complex contracts to 11.77 Aa and 9.35 Aafter heating at 60 degrees C. The DTA-TG data indicate that water is present in these new complexes, the decomposition of which occurs between 290 degrees C and 400 degrees C. Modifications observed in the high-frequency region of the spectra obtained after heating suggest that K ions occupy the ditrigonal holes in the OH surface of the kaolinite layers, whereas water is probably located between the KAc layer and the OH surface of the kaolinite. This structural arrangement would favour the H-bonding between inner-surface OH groups and water and justifies the presence of new bands at lower frequencies. Electrostatic interactions between the keyed K ions and O of the inner OH groups would justify the modifications of the 3619 cm (super -1) OH-stretching band.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

  • SCOPUS: 2-s2.0-0033369483
  • ISSN: 00098558
  • PUI: 129620219
  • SGR: 0033369483

Authors

  • M. D. R. Cruz

  • F. I. F. Duro

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free