Abstract
WE have already outlined1 the results of an X-ray examination of thin calcium fluoride films, evaporated on polished glass surfaces. The powder X-ray camera used was of the Seeman–Bohlin focusing type. It had a radius of 10 cm. and carried photographic film about 2 cm. wide set symmetrically to the mean plane of incidence of the X-rays. Consequently it was only the portions of the spectral lines due to the scattering in the immediate region of the incident plane which were recorded. From measurements of the relative intensities of the lines, it was evident that there was orientation of either the (111) or the (110) planes of the crystallites, and that this orientation depended on the temperature, T, of the glass substrate during deposition.
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References
Bannon, J., and Curnow, C. E., Nature, 161, 136 (1948).
Wyllie, M. R. T., Rev. Sci. Instr., 18, 425 (1947).
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BANNON, J., COOGAN, C. Thin Evaporated Calcium Fluoride Films. Nature 163, 62–63 (1949). https://doi.org/10.1038/163062c0
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DOI: https://doi.org/10.1038/163062c0
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