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Short Courses and Workshops

The Group for Structural Research of the Czechoslovak Scientific and Technical Society prepared a colloquium "Computational and Experimental Techniques in Structure Analysis." The colloquium, which was held in Stara Lesna, 15-19th May 1989, was attended by 124 participants, mostly from Czechoslovakia. Altogether, 61 papers were submitted, of which 28 were presented orally, at plenary sessions, and 33 at poster sessions. The subject areas covered were crystal structure determination, chemical crystallography, structure-activity studies, statistics in crystallography, electronic-structure calculations, ab initio calculations of electron density distribution, proton scattering from single crystals, and, last but not least, powder diffraction. An entire day was devoted to powder diffraction, during which the following lectures were presented: E.K. Vasiliev (USSR): X-Ray diffraction phase analysis J. Fiala: X-Ray powder diffractometry historical development and present status A. Buchal: Use of X-ray diffraction in physical metallurgy R. Kuzel: Synchrotron radiation in powder diffractometry T. Havlik: RIFRAN 89 automated powder diffraction identification using ATARI 130 XE microcomputer M. Skrobian: MIKRO Q quantitative powder diffraction phase analysis with the use of the microcomputer ATARI 130XE J. Neumann: X-Ray diffraction monitoring of the laser surface treatment Q.Jackuliak: Determination of the carbon content in steel martensite through X-ray diffraction line profile analysis J. Neumann: Comparison of the dislocation density determination by X-ray diffraction and transmission electron microscopy Considerable interest was aroused by the discussion of the incorrect denotation of "Bragg-Brentano parafocusing geometry" on the basis of historical documentation extended kindly by Dr. William Parrish. The chairman of the Commission on Czechoslovak Crystallographic Terminology, Dr. S. Durovic, even proposed that this designation should be replaced by "Parrish geometry."