Skip to main content
SpringerLink
Log in

Hydrothermal transformation of clinoptilolite

  • Published:
Bulletin of Materials Science Aims and scope Submit manuscript

Abstract

Procedure for hydrothermal transformation of natural clinoptilolite at 160°C is described. The synthesis is carried out in the system Na2O-Al2O3-SiO2-H2O. Products of 24–168 hr runs are characterized by x-ray diffraction,ir spectroscopy, energy dispersive analysis of x-rays (edax), and electron microscopy. Presence of analcime-type and faujasite-type zeolites in the final products is established. Si/Al ratio of the final mixed phase is estimated as 2·91. Spheroid crystals of analcime, fibrous crystals of mordenite (on analcime), and well developed polyhedral crystals of analcime-faujasite mixed phase are illustrated and described. It is shown that crystals grow by two-dimensional nucleation mechanism.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • Barrer R M and Denny D J 1961J. Chem. Soc. 983

  • Choudhari A L 1983Studies on physico-chemical properties of natural scolecite and stilbite, and synthesis of some zeolites by hydrothermal method Ph.D. thesis, Sardar Patel University, Vallabh Vidyanagar

    Google Scholar 

  • Flanigen E M, Khatami H and Szymansky H A 1971 Molecular Sieve Zeolites (Washington D.C.: American Chemical Society)1 201

    Google Scholar 

  • Joshi M S, Choudhari A L and Kanitkar R G 1983Cryst. Res. Technol. 18 1347

    Article  CAS  Google Scholar 

  • Joshi M S, Rao Mohan P, Choudhari A L and Kanitkar R G 1982aCryst. Res. Technol. 17 925

    Article  CAS  Google Scholar 

  • Joshi M S, Rao Mohan P, Choudhari A L and Kanitkar R G 1982bJ. Mater. Sci. Lett. 1 195

    Article  CAS  Google Scholar 

  • Miyata Y and Okazaki S 1970Kogyo Koyaku Zasshi 73 1940

    CAS  Google Scholar 

  • Negishi T and Nakamura H 1970Kobustugaku Zasshi 10 72

    CAS  Google Scholar 

  • Robson H E and Riley L K 1977 Molecular Sieves II.Amer. Chem. Soc. Symp. Ser. 40 233

    CAS  Google Scholar 

  • Sudo T and Matsuoka M 1959Geochim. Cosmochim. Acta 17 1

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Physics, Sardar Patel University, 388 120, Vallabh Vidyanagar, India

    M S Joshi & V V Joshi

Authors
  1. M S Joshi
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. V V Joshi
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Joshi, M.S., Joshi, V.V. Hydrothermal transformation of clinoptilolite. Bull. Mater. Sci. 7, 475–481 (1985). https://doi.org/10.1007/BF02744057

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02744057

Keywords

Search

Navigation