Kohtaro Ishida

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Symmetry and physical aspects of 'forbidden' reflections excited by a local polarization anisotropy of the X-ray susceptibility are surveyed. Such reflections are observed near absorption edges where the anisotropy is caused by distortions of the atomic electronic states owing to interaction with neighbouring atoms. As a consequence, they allow for(More)
Trace amounts of bismuth have been determined by atomic-absorption spectrophotometry after adsorption of the 2-mercaptobenzothiazole complex on naphthalene. The method has been applied to the determination of bismuth in aluminium alloys.
The fine-structure spots in an electron diffraction pattern from a crystal wedge represent the strong partial waves of strongly excited Bloch waves. Diffraction experiments near the [100] and the [110] zone axes of a CaF, crystal were carried out in order to determine from a fine-structure profile analysis the low-indexed structure potentials V n i , V200(More)
Thin-layer Chromatographic behaviour of magnesium, calcium, strontium and barium on diethylaminoethyl cellulose has been investigated in methanol-nitric acid mixtures. R(f) values are in the order magnesium > calcium > strontium > barium. The differences in R(f) values are large enough to allow good separations of the four metal ions from each other. The(More)
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