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Crystallography Made Crystal Clear makes crystallography accessible to readers who have no prior knowledge of the field or its mathematical basis. This is the most comprehensive and concise reference for beginning Macromolecular crystallographers, written by a leading expert in the field. Rhodes'uses visual and geometric models to help readers understand the mathematics that form the basis of x-ray crystallography. He has invested a great deal of time and effort on World Wide Web tools for users of models, including beginning-level tutorials in molecular modeling on personal computers. Rhodes'personal CMCC Home Page also provides access to tools and links to resources discussed in the text. Most significantly, the final chapter introduces the reader to macromolecular modeling on personal computers-featuring SwissPdbViewer, a free, powerful modeling program now available for PC, Power Macintosh, and Unix computers. This updated and expanded new edition uses attractive four-color art, web tool access for further study, and concise language to explain the basis of X-ray crystallography, increasingly vital in today's research labs.• Helps readers to understand where models come from, so they don't use them blindly andinappropriately • Provides many visual and geometric models for understanding a largely mathematical method • Allows readers to judge whether recently published models are of sufficiently high quality and detail to be useful in their own work • Allows readers to study macromolecular structure independently and in an open-ended fashion on their own computers, without being limited to textbook or journals illustrations • Provides access to web tools in a format that will not go out of date. Links will be updated and added as existing resources change location or are added

To solve a crystal structure means to determine the precise spatial arrangements of all of the atoms in a chemical compound in the crystalline state. This knowledge gives a chemist access to a large range of information, including connectivity, conformation, and accurate bond lengths and angles. In addition, it implies the stoichiometry, the density, the symmetry and the three dimensional packing of the atoms in the solid. Since interatomic distances are in the region of100-300 pm or 1-3 A, 1 microscopy using visible light (wavelength Ä ca. 300-700 nm) is not applicable (Fig. l. l). In 1912, Max von Laue showed that crystals are based on a three dimensionallattice which scatters radiation with a wavelength in the vicinity of interatomic distances, i. e. X -rays with Ä = 50-300 pm. The process bywhich this radiation, without changing its wave­ length, is converted through interference by the lattice to a vast number of observable'reflections'with characteristic directions in space is called X-ray diffraction. The method by which the directions and the intensities of these reflections are measured, and the ordering of the atoms in the crystal deduced from them, is called X-ray struc­ ture analysis. The following chapter deals with the lattice properties of crystals, the starting point for the explanation of these interference phenomena. Interatomic distances Crystals..........

X-Ray Diffraction Topography presents an elementary treatment of X-ray topography which is comprehensible to the non-specialist. It discusses the development of the principles and application of the subject matter. X-ray topography is the study of crystals which use x-ray diffraction. Some of the topics covered in the book are the basic dynamical x-ray diffraction theory, the Berg-Barrett method, Lang's method, double crystal methods, the contrast on x-ray topography, and the analysis of crystal defects and distortions. The crystals grown from solution are covered. The naturally occurring crystals are discussed. The text defines the meaning of melt, solid state and vapour growth. An analysis of the properties of inorganic crystals is presented. A chapter of the volume is devoted to the characteristics of metals. Another section of the book focuses on the production of ice crystals and the utilization of oxides as laser materials. The book will provide useful information to chemists, scientists, students and researchers.

The Laue Method demonstrates why and how the Laue method provides an easy vehicle for identification of crystalline species. The more important aspects of classical crystal theory and projection methods (such as the stereographic, gnomonic and stereognomonic projections) are discussed. The subject matter of this book falls into two parts. After a brief historical introduction that considers early interpretation of Laue photographs and Laue's theory of diffraction by crystals, the first part provides, at an elementary level, a simple and compact treatment of the Laue method and the background needed to make use of it. The stereographic projection, gnomonic projection, stereognomonic projection, and crystallochemical analysis are covered here. The chapters that follow examine the Laue method on a higher level, paying particular attention to the polychromatic component, the cross ratio and its application in crystallography, and the indexing of Laue photographs. The reader is also introduced to the optics of the Laue method and the application of Laue photographs to the study of diffuse scattering. The book concludes with a very simple new interpretation of the Laue method. This book should appeal to both students and specialists who study crystals.