The Diffraction of X-rays in Liquids containing Heavy Atoms


IT is now generally accepted1, 2, 3, 4 that X-ray diffraction in liquids is mainly due to the relative positions of the molecules and only in second instance to their inner structure. If the effect of the last factor is known, some information regarding the first factor may be obtained from an analysis of the observed diffraction pattern.3 This circumstance is realised in the case of monatomic molecules, for example, argon, or mercury.5, 6 In most cases, however, as when using organic compounds, the inner structure is not known, and then no unequivocal conclusion, or nearly none, may be drawn from the diffraction pattern.

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    C. V. Raman and K. R. Ramanathan, Proc. Ind. Assoc. for Cultiv. Science, 8, II, 127; 1923.

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    P. Debye, Jour. of Math. and Phys. Massachusetts, 4, 133; 1925; and Phys. Zeitschrift, 28, 135; 1927.

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    F. Zernike und J. A. Prins, Zeitschr.f. Phys., 41, 184; 1927.

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    W. H. Keesom and J. de Smedt, Proc. Amsterdam, 25, 118; 1922; W. H. Keesom, Proc. Amsterdam, 30, 341; 1927.

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    J. A. Prins, Physica, 6, 315; 1926.

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    D. Coster et J. A. Prins, Jour. de Phys., 9, 153; 1928.

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    Solutions have been studied from another point of view by R. W. G. Wyckoff ("The Structure of Crystals", New York, 383; 1924) and W. H. Keesom (Proc. Amsterdam, 30, 341; 1927).

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    Kindly put at our disposition by Prof. L. Ruzicka in Utrecht.

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    G. W. Stewart and others, Several articles; Phys. Rev., 31, 32; 1927 and 1928; J. R. Katz, Chemiker-Ztg., 51, 384; 1927.

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PRINS, J. The Diffraction of X-rays in Liquids containing Heavy Atoms. Nature 123, 84 (1929).

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