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Science 22 January 1993:
Vol. 259. no. 5094, pp. 495 - 497
DOI: 10.1126/science.259.5094.495
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Articles

A Cationic Cesium Continuum in Zeolite X

Tao Sun 1, Karl Seff 1, Nam Ho Heo 2, and Vitalii P. Petranovskii 3

1 Department of Chemistry, University of Hawaii, Honolulu, HI 96822
2 Department of Industrial Chemistry, Kyungpook National University, Taegu 702-701, South Korea
3 A. F. loffe Physical Technical Institute, Academy of Sciences of Russia, St. Petersburg 194021, Russia

A cesium continuum that fills the channels and cavities of zeolite X has been prepared, and its structure has been determined by single-crystal x-ray crystallography. The three-dimensional continuum is cationic to balance the negative charge of the zeolite framework. Its valence electrons, only 0.3 per Cs+ ion, are widely delocalized over 95 percent of the cesium ions in the crystal. The continuum has a unit cell formula of (Cs122)86+ and contains Cs13 and Cs14 clusters (one per supercage) arranged like the atoms in diamond, with one Cs2 appendix (in the sodalite cavity) per cluster.

Submitted on August 17, 1992
Accepted on November 13, 1992


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Capillarity and Wetting of Carbon Nanotubes.
E. Dujardin, T. W. Ebbesen, H. Hiura, and K. Tanigaki (1994)
Science 265, 1850-1852
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Science. ISSN 0036-8075 (print), 1095-9203 (online)