Crystallization field and rate study for the formation of single phase sodium-potassium and potassium clinoptilolite

Guvenir O., KALIPÇILAR H., Culfaz A.

CRYSTAL RESEARCH AND TECHNOLOGY, vol.46, no.4, pp.345-350, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 46 Issue: 4
  • Publication Date: 2011
  • Doi Number: 10.1002/crat.201000513
  • Journal Name: CRYSTAL RESEARCH AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.345-350
  • Keywords: clinoptilolite, crystallization field, sodium-potassium cations, salt additions, ELECTRON-SPIN-RESONANCE, ADSORBATE INTERACTIONS, ETHYLENE DIMERIZATION, ECHO MODULATION, ALUMINOSILICATE, SEED
  • Middle East Technical University Affiliated: Yes

Abstract

Reproducible synthesis of clinoptilolite as the single crystalline phase was achieved in the narrow crystallization field at or around the nominal batch composition of 2.1(Na2O+K2O):Al2O3:10SiO(2):110H(2)O at 140 degrees C. Clinoptilolites of high purity were crystallized in the pure sodium or mixed sodium-potassium cation systems. Partial replacement of hydroxyl anions with the salts of carbonates or chlorides also yielded clinoptilolite as the single crystalline phase although at lower crystallization rates. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim