Measurement of xenon distribution statistics in Na-A zeolite cavities

B. F. Chmelka, D. Raftery, A. V. McCormick, L. C. De Menorval, R. D. Levine, A. Pines

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83 Scopus citations

Abstract

Xe129 NMR spectroscopy has been used to probe directly the distribution of xenon atoms confined in atomic-size Na-A zeolite cavities. For mean xenon occupancies less than about three Xe atoms per ±-cage, the guest populations are well described by binomial statistics. At higher guest loadings the finite volumes of the xenon atoms become significant, as reflected by a fit of the experimental populations with a hypergeometric distribution. The data and hypergeometric analysis indicate a maximum occupancy of seven Xe atoms/cage. At the highest xenon loadings the experimental distribution is narrower than hypergeometric.

Original languageEnglish (US)
Pages (from-to)580-583
Number of pages4
JournalPhysical review letters
Volume66
Issue number5
DOIs
StatePublished - 1991
Externally publishedYes

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