Light Figures of Bismuth Single Crystals and the Determination of Their Crystal Orientations by the Light-Figure Method. III : Orientation Determination by Light Figures

概要

論文の詳細を見る
We have worked out the procedure for a perfect, rapid and accurate determination of orientations of trigonal bismuth single crystals by the use of light figures produced by their {111} and {uuv} planes, the indices of the latter plane being high and somewhat indefinite. Full accounts are given of the geometrical relationships, procedure and etching directions required for the orientation determination, the directly and accurately measurable ranges and kinds of angles, the representation of crystal orientations, and the accuracy and actual examples of the orientation determination. It is shown that the perfect determination of crystal orientations can be made with an accuracy within ±0.2°by the use of {111} and {uuv} light figures produced by etching with 50 percent aqueous solution of 1 : 2 mixture of hydrochloric acid and nitric acid, though bismuth crystals show complex light-figure phenomena, different from cubic crystals and hexagonal zinc crystals, and consequently the procedure of orientation determination by the light-figure method becomes somewhat complicated.
東北大学の論文