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Advanced Structural Inorganic Chemistry$
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Wai-Kee Li, Gong-Du Zhou, and Thomas Mak

Print publication date: 2008

Print ISBN-13: 9780199216949

Published to Oxford Scholarship Online: May 2008

DOI: 10.1093/acprof:oso/9780199216949.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 25 February 2021

Symmetry in Crystals

Symmetry in Crystals

Chapter:
(p.300) 9 Symmetry in Crystals
Source:
Advanced Structural Inorganic Chemistry
Author(s):

Wai-Kee Li

Gong-Du Zhou

Thomas Chung Wai Mak

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199216949.003.0009

The symmetry properties of molecules were discussed in Chapter 6, and the corresponding properties of crystals are presented here. In contrast to discrete molecules, crystals have a lattice structure with three-dimensional periodicity. Hence, additional symmetry elements such as translations, screw axes, and glide planes, which are applicable to an infinitely extended system, need to be considered. This chapter introduces the concept and nomenclature of space groups and their application in describing the structures of crystals. Examples of crystal structures for selected space groups are provided. The chapter concludes with a section on the use of space group symmetry in the determination of crystal structure. In short, the chapter gives a succinct introduction to the symmetry of crystals.

Keywords:   asymmetric unit, Bravais lattices, crystal classes, equivalent positions, fractional coordinates, glide plane, Miller indices, Hermann-Mauguin notation, screw axis, space groups

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