Letter | Published:

Spiriform Morphology of some Lead Crystal Growths in Silica Gel

Naturevolume 140page589 (1937) | Download Citation

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Abstract

IT has been wrell known since A. L. Simon's description of the phenomenon1, that fern-like crystal growths of lead can be obtained in silicic acid gels containing lead acetate solution. Whereas Simon used zinc to promote the electrochemical liberation of metallic lead in the gel, the use of tin for the same purpose leads to the formation of crystals of a strikingly different morphology and lustre.

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References

  1. 1

    Koll.-Z., 12, 171 (1913).

  2. 2

    Koll.-Z., 27, 225 (1920); Biochem. J., 14, 418 (1920)

  3. 3

    Koll.-Z., 47, 60 (1929).

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  1. Royal College of Science, South Kensington, S.W.7.

    • NORMAN STUART

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https://doi.org/10.1038/140589b0

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