“Immobilization of Large, Aliovalent Cations in the Small-Pore Zeolite K-Natrolite by Means of Pressure”
Y. Lee*. Y. Lee, D. Seoung, J.-H. Im, H.J. Hwang, T.H. Kim, D. Liu, Z. Liu, S.Y. Lee, C.-C. Kao, T. Vogt
Angewandte Chemie International Edition
Vol.51(20), pp.4848-4851, 2012.05
High-pressure ion exchange of small-pore zeolite K-natrolite allows immobilization of nominally non-exchangeable aliovalent cations such as trivalent europium. A sample exchanged at 3.0(1) GPa and 250 °C contains about 4.7 EuIII ions per unit cell, which is equivalent to over 90 % of the K+ cations being exchanged (see picture).