Abstract
BRENNAN et al.1 quoted our earlier communication2 in connexion with the determination of the effective crosssectional areas of adsorbed xenon molecules, σ(Xe). However, a numerical error appears in their article. The values 13.8 and 17.2 Å2 were not given in our communication and the value σ(Kr) = 19.5 Å2 was not used as a reference value. Our communication indicated that we found from the measurements of xenon adsorption on evaporated nickel films at 78° K that σ(Xe) = 19.3 Å2, and from measurements at 90° K that σ(Xe) = 21.8 Å2. Moreover, σ(Kr) = 21 Å2 was used as the reference value. The adsorbed amounts of xenon and krypton were always estimated by the same volumetric method and evaluated by means of the Brunauer–Emmett–Teller theory.
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References
Brennan, D., Graham, M. J., and Hayes, F. H., Nature, 199, 1152 (1963).
Ponec, V., and Knor, Z., Coll. Czech. Chem. Comm., 27, 1091 (1962).
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KNOR, Z., PONEC, V. Adsorption of Krypton and Xenon on Evaporated Metal Films. Nature 204, 466 (1964). https://doi.org/10.1038/204466a0
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DOI: https://doi.org/10.1038/204466a0
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