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Zeolites and microporous crystals
Authors: ---
ISBN: 044498657X 9780444986573 9780080887715 0080887716 9786611779122 1281779121 4062069091 Year: 1994 Publisher: Tokyo Amsterdam New York Kodansha Elsevier

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Abstract

This volume comprises the proceedings of the International Symposium on Zeolites and Microporous Crystals (ZMPC '93). At this meeting progress in the following areas was discussed: crystal chemistry; synthesis; ion exchange and modification; adsorption and diffusion; intercalation and cross-linking; host-guest interaction; catalysis; applications.


Book
Crystals, x-rays and proteins
Authors: --- ---
ISBN: 0191035521 9780191035524 9780191595028 0191595020 9780199559046 019955904X Year: 2011 Publisher: Oxford Oxford University Press

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A complete account of the theory of the diffraction of X-rays by crystals, with particular reference to the processes of determining the structures of protein molecules. This book is aimed primarily at structural biologists and biochemists but will also be valuable to those entering the field with a background in physical sciences or chemistry. It may be used at any post-school level, and develops from first principles all relevant mathematics, diffraction and wave theory, assuming no mathematical knowledge beyond integral calculus. The book covers a host of important topics in the area, including: * The practical aspects of sample preparation and X-ray data collection, using both laboratory and synchrotron sources * Data analysis at both theoretical and practical levels * The important role played by the Patterson function in structure analysis, by both molecular replacement and experimental phasing approaches * Methods for improving the resulting electron density map* The theoretical basis of methods used in refinement of protein crystal structures * In-depth explanation of the crucial task of defining the binding sites of ligands and drug molecules * The complementary roles of other diffraction methods: these reveal further detail of great functional importance in a crystal structure.


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Symmetry relationships between crystal structures
Author:
ISBN: 0191648809 0198807201 0191648795 0199669953 9780191648793 9780191648809 9781299684829 1299684823 9780199669950 Year: 2013 Publisher: Oxford Oxford University Press

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In crystal chemistry and crystal physics, the relations between the symmetry groups (space groups) of crystalline solids are of special importance. Part 1 of this book presents the necessary mathematical foundations and tools: the fundamentals of crystallography with special emphasis on symmetry, the theory of the crystallographic groups, and the formalisms of the needed crystallographic computations. Part 2 gives an insight into applications to problems in crystal chemistry. Withthe aid of numerous examples, it is shown how crystallographic group theory can be used to make evident relationshi

The effective crystal field potential
Authors: ---
ISBN: 0080436080 9780080436081 1281186406 9781281186409 9786611186401 0080530710 9780080530710 Year: 2000 Publisher: Amsterdam New York Elsevier

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As it results from the very nature of things, the spherical symmetry of the surrounding of a site in a crystal lattice or an atom in a molecule can never occur. Therefore, the eigenfunctions and eigenvalues of any bound ion or atom have to differ from those of spherically symmetric respective free ions. In this way, the most simplified concept of the crystal field effect or ligand field effect in the case of individual molecules can be introduced. The conventional notion of the crystal field potential is narrowed to its non-spherical part only through ignoring the dominating spherical part

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