Study on the Intensity Anomaly of Electron Diffraction Powder Patterns from Minute Silver Crystallites
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概要
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Electron diffraction powder patterns from extremely minute crystallites of evaporated silver show a peculiar intensity anomaly: the most remarkable part of it is that the ratio of the integral intensity of the (200)-reflection to that of the (111)-reflection is far smaller than the one calculated, and the former reflection is much broader than the latter. The anomaly can be ascribed to a stacking disorder in the (111)-plane in the minute silver crystallites. The calculated line profiles can be made to coincide with the observed ones, if the following parameters are adequately determined: $\alpha$, the probability with which the stacking fault occurs; L1 and L2, the dimensions of the crystallites parallel and perpendicular respectively to the (111)-plane of the crystallite; and $\sqrt{\langle u^{2}\rangle_{AV}.,}$ the amount of the average lattice distortion due to small inhomogeneous lattice distortions in the crystallites. For example they turned out to be, for one specimen, $\alpha{=}0.84$, $\text{L}_{1}{=}20$ Å, $\text{L}_{2}{=}47$ Å; for turned specimen, $\alpha{=}0.70$, $\text{L}_{1}{=}{14}$ Å, $\text{L}_{2}{=}33$ Å and $\sqrt{\langle u^{2}\rangle_{AV}}{=}0.14$ Å.
- INSTITUTE OF PURE AND APPLIED PHYSICSの論文
- 1953-11-25