Ion-exchange properties of the natural zeolite amicite

Authors

  • Nikita V. Chukanov Institute of Problems of Chemical Physics
  • Olga N. Kazheva Institute of Problems of Chemical Physics
  • Nadezhda A. Chervonnaya Institute of Problems of Chemical Physics
  • Dmitry A. Varlamov Institute of Experimental Mineralogy
  • Vera N. Ermolaeva Institute of Experimental Mineralogy
  • Igor V. Pekov Faculty of Mineralogy, Moscow State University
  • Gennadiy V. Shilov Institute of Problems of Chemical Physics

DOI:

https://doi.org/10.20450/mjcce.2020.1984

Keywords:

amicite, zeolite, ion exchange, crystal structure, infrared spectroscopy

Abstract

Crystals of the natural zeolite amicite, ideally K4Na4(Al8Si8O32)·10H2O, were ion-exchanged in the reactions with 0.1 N aqueous solutions of AgNO3, RbNO3, CsNO3 and Pb(NO3)2 at 363 K for 24 h. Under these conditions, Cs+ substitutes K+ whereas the most part of Na+ remains unexchanged; Rb+ partly substitutes both Na+ and K+; Pb2+ and Ag+ completely substitute Na+ and K+. All the compounds are monoclinic. The Cs- and Rb-substituted samples have unit-cell parameters close to those of initial amicite. The exchange of Na+ and K+ for Ag+ is accompanied by a significant decrease of the unit-cell volume. The unit-cell parameter c of Pb-amicite is nearly threefold larger than the c parameter of initial amicite. Infrared spectra show that framework topology is preserved during the ion exchange. The crystal structures of initial and Cs-exchanged amicites have been solved by direct methods.

References

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Published

2020-10-14

How to Cite

Chukanov, N. V., Kazheva, O. N., Chervonnaya, N. A., Varlamov, D. A., Ermolaeva, V. N., Pekov, I. V., & Shilov, G. V. (2020). Ion-exchange properties of the natural zeolite amicite. Macedonian Journal of Chemistry and Chemical Engineering, 39(2), 207–216. https://doi.org/10.20450/mjcce.2020.1984

Issue

Vol. 39 No. 2 (2020)

Section

Materials Chemistry

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