Abstract
A SHORT time ago, experimental results were published by the present writer and F. W. Spiers on the X-ray scattering factors of nickel, copper and zinc atoms for copper K. radiation. While the observed values for nickel and copper lay on smooth curves when the scattering factors were plotted against (sin )/ in the usual way, in the case of zinc the scattering factors for certain reflections were found to lie well off the mean curve. It was noted at the time of publication that these discrepant results were consistently obtained and it has since been found that similar results are obtained with cadmium; both metals have a closed packed hexagonal structure with axial ratios c/a = 1.856 for zinc and 1.886 for cadmium. Cadmium is a more favourable metal to investigate for, having larger lattice spacings, it gives more reflections than zinc and they are relatively stronger.
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BRINDLEY, G. An X-Ray Examination of Atomic Vibrations in Zinc and Cadmium. Nature 137, 315–316 (1936). https://doi.org/10.1038/137315b0
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DOI: https://doi.org/10.1038/137315b0
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