The powder method-the analysis of poly< ryslalline or powdered materials by passing x-rays through the sample and recording the resulting diagram- is probably the most widely used application of x-ray diffraction, as well as one of the most modern and accurate means of analysis. This book contains a complete exposition of the principles and utilization of the powder method.The practice of the powder method is inherently simple, and the results it provides are so valuable that it is used as a routine tool not only in many branches of science but in many industries. But frequently the person making and interpreting powder photographs for this purpose has no specific training in the subject. It is for this person that the book has been written. The authors show him what the powder method is, how it fits into the larger field of x-ray crystallography, and how to interpret the results obtained from its use.The discussion is kept on a fundamental plane, and no mathematics beyond simple vector algebra is assumed. ЛИ necessary mathematics is included in the simplest and most complete way possible. Detailed examples illustrate virtually all principles, and a complete collection of charts for laboratory use of indexing procedures is included.A unique feature of this book is the detailed discussion of the indexing of powder photographs for all possible symmetries. This includes mention of all indexing systems deviled to date.

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