Get Advances in X-Ray Analysis: Volume 27 PDF

By Jerome B. Cohen

This quantity constitutes the complaints of the 1983 Denver convention on functions of X-ray research and is the twenty seventh within the sequence. The convention used to be held together with the yank Crystal­ lographic organization at Snowmass inn, Colorado, from August 1 to five, 1983. The papers showing during this quantity are just from pre­ dominantly Denver convention (DC) classes and from joint DC/ACA periods. The early plans for containing a joint convention have been initiated a few 3 years in the past via Q. C. Johnson of Lawrence Livermore Lab, J. B. Cohen of Northwestern college and P. ok. Predecki of the collage of Denver and have been finally delivered to fruition through a jOint organizing committee including: O. P. Anderson, Colorado country collage (ACA) , D. E. Leyden, Colorado country collage (DC), R. D. Witters, Colorado institution of Mines (ACA) and P. ok. Predecki (DC). We take this chance to thank the committee individuals and the early planners for his or her imaginative and prescient, ingenuity and difficult paintings with no which the convention shouldn't have materialized. there has been no plenary consultation in 1983, in its place a few particular periods have been geared up and chaired by way of quite a few members.

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J. Gerdes, A. J. C. Wilson, "Propagation of Some Systematic Errors in X-ray Line Profile Analysis", Acta Cryst. 22 (1967) 155-162 (7) G. Allegra, "Crystal Powder Statistics. IV. Calculation of the Line Profile Using the Sampling Line Method", Acta Cryst. A38 (1982) 863-867 (8) F. de Bergevin and P. Germi, "Corrections des Oscillations dans les Distributions de Tailles des Particules Obtenuees a Partir des Profils des Raies de Diffraction", J. Appl. Cryst. 5 (1972) 416-420 (9) I. S. Szanto and L.

The bytes 1-10 contain the first 10 characters of the mineral name, while the file, card, and record numbers occupy two bytes each. The file is ordered by the composite number obtained by equivalencing the first eight bytes of each record with a double precision real number. The retrieval process thus reduces to a binary search of this cross-index by composite number. For each entry with the correct composite number a comparison is done on the last two bytes. There are several limitations to the utility of the index.

The purpose of this study was to evaluate the performances of peak search methods by derivatives in terms of their accuracy, precision and resolution in order to develop an optimum algorithm for high precision and high resolution peak search analysis of X-ray diffraction data. An interactive time sharing computer method was developed using a new peak search algorithm combining the first and second derivatives. The peak intensity was determined by fitting a Lorentzian curve to the highest points.

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