Abstract
BY Dr. U. R. Evans's method1 of electrolysis, almost transparent thin films were detached from the surface of electrolytic iron made passive by immersion in potassium chrornate solution. These films were examined by means of a cathode ray of about 50 kilovolts. Spacings of the diffracting substance were calculated from the diameters of several diffraction rings and it was found, as the accompanying table shows, that the films are composed of γ-Fe2O3 or Fe3O4.
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Evans, U. R., J. Chem. Soc., 127, 1020 (1927).
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IITAKA, I., MIYAKE, S. & IIMORI, T. Examination of Passive Iron by Electron Diffraction. Nature 139, 156 (1937). https://doi.org/10.1038/139156a0
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DOI: https://doi.org/10.1038/139156a0
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