International Tables for Crystallography is the definitive resource and reference work for crystallography and structural science. Each of the eight volumes in the series contains articles and tables of data relevant to crystallographic research and to applications of crystallographic methods in all sciences concerned with the structure and properties of materials. Emphasis is given to symmetry, diffraction methods and techniques of crystal-structure determination, and the physical and chemical properties of crystals. The data are accompanied by discussions of theory, practical explanations and examples, all of which are useful for teaching. International Tables for Crystallography provides access to the content of the full set (6000 pages) of all the Volumes A to G including A1 in pdf format and also provides access to the International Tables Online site hosted by the International Union of Crystallography. The International Tables Online site contains the full text of the series as both pdf and richly interlinked html, along with many innovative features and additional resources. The advanced search facility enables sophisticated searches to be performed across all the volumes, across selected volumes and across International Tables Online and Crystallography Journals Online. The International Tables for Crystallography includes nearly 2,000 pages of symmetry tables which are vital for the analysis of crystal structures, and which feature extensive linking between sub- and supergroups. The contents can be browsed by volume, across the 8 volumes below: Volume A: Space-group symmetry, 5e Volume A1: Symmetry relations between space groups Volume B: Reciprocal space, 3e Volume C: Mathematical, physical and chemical tables, 3e Volume D: Physical properties of crystals Volume E: Subperiodic groups Volume F: Crystallography of biological macromolecules Volume G: Definition and exchange of crystallographic data Within each volume, users can navigate to view a full chapter, a section or sub-section, or a single figure or table. Cross-references are included between chapters of related interest. With new editions of volumes E and A1 to be added in 2010, and further new editions to be added in subsequent years, the International Tables Online truly represents the most up-to-date, dynamic, and comprehensive reference work available to crystallographers, and to all those who use crystallography across a wide range of fields.