Letter | Published:

The Atomic Weight of Fluorine

Nature volume 128, page 375 (29 August 1931) | Download Citation

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Abstract

THERE is a good deal of evidence from chemical sources that the atomic weight of fluorine is greater than 19.00. In recent years the ratio of sodium fluoride to sodium chloride has been determined by McAdam and Smith,1 who find the value 19.009. In addition, from the limiting density of silicon fluoride, Germann and Booth2 find the value 19.010, assuming that the atomic weight of silicon is 28.06. The only work which supports the value 19.00 is that of Moles and Batuecas3 on the limiting density of methyl fluoride. Since methyl fluoride is a difficult gas to prepare in a state of purity by the method employed by Moles, and since, moreover, his density determinations show divergences far in excess of the experimental error, we have recently carried out a redetermination of the limiting density, using the same microbalance method as that employed for xenon.4

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References

  1. 1.

    Carnegie Institution Report, No. 267, p. 47; 1918.

  2. 2.

    Jour. Phys. Chem., vol. 21, p. 81; 1917.

  3. 3.

    Jour. Chim. Phys., vol. 18, p. 353; 1920.

  4. 4.

    NATURE, vol. 127, p. 970; 1931.

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Author information

Affiliations

  1. The University, Leeds, July 23.

    • H. S. PATTERSON
    • , R. WHYTLAW-GRAY
    •  & W. CAWOOD

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DOI

https://doi.org/10.1038/128375a0

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