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BULLETIN OF THE GEOLOGICAL SOCIETY OF CHINA VOL. XXVII I'I'. 265.272, 9 FIGS, NOV. 1947 A Modifte'd Schiebold X-Ray Rotation Goniometer for Cylindrical Film and A Device for Graphic Solution of the Photographs BY T.L.Ho (National University of Shantung) With 9 Text-Figs In research of the structure of crystals, an X-ray rotation goniometer would always fe placed at hand. Among those the Schiebold rotation goniometer for cylindrical film' has been proved to be more satisfactory in the observation of the crystal syminetery than others. The principle of this goniometer is simple and When a crystal is rotated about a vertical axis in a would be mentioned first. horizontal beam of X-ray (Fig. 1), all the atomic planes in the vertical zone will reflect X-rays in the equatorial plane or zero layer as they fulfil the condition À=2dsin6. The reflecóøn spots are scattered in a line, whose glancing angics can be found from tan 2t9=PO/KO. KO is the distance of the crystal from the photographic plate and PO the distance of a spot f rom the point of direct incidence. In case of cylindrical film with a radius R=90/fmm, 2ff R - p (1) p=9 Krist. 86. 270.383 1933. Zeitschrieft
Acta Geologica Sinica (English Edition) – Wiley
Published: Mar 1, 1947
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