International Tables Online All eight volumes A to G including A1 as pdfs and richly interlinked html 6000 pages 300 chapters 680 tables of fundamental data 1100 tables of symmetry information Interactive features and resources The series comprises 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. Each volume also contains discussions of theory, practical explanations and examples, all of which are useful for teaching.

Navigating through the volumes is quick and easy Navigating through the volumes is quick and easy. The dark green banner at the top of each page can be used to move rapidly between the volumes and offers a simple full-text search facility. Any one of the 1100 tables of symmetry data within International Tables can be retrieved directly from the home page for the volume using the drop-down menus.

Concise contents lists provide links to full chapters and the main sections of chapters. More detailed contents lists are available for each individual chapter or for an entire volume, providing links to every section, table and figure in every chapter. In this way, finding the data or article you need within the 6000 pages of International Tables is simply a matter of a couple of clicks of the mouse.

The html pages for each of the 300 chapters within International Tables Online have several useful features. The text of each chapter is enhanced with links from citations within the text to the full references. Numerous links to other articles, tables, figures or equations within International Tables and to external websites are also provided. Important points such as examples and theorems are highlighted. Pdfs of the whole chapter or of individual sections, tables or figures can also be downloaded. It is possible to move rapidly around each chapter using the chapter contents list or to find key terms within the chapter using the chapter index, which provides links back to the exact point(s) in the text at which a term is mentioned. All other International Tables articles cited in the present chapter are also listed as related articles. The previous and next buttons at the top of each page can also be used to move back or forwards through the volume, much as one might read a printed book.

The tables of symmetry data have the additional advantage of hyperlinks between space groups and their sub- or supergroups. The `information' button at the top of each page of space-group data leads to an online guide to the meaning of all the items on the page. Each table of symmetry data can also be downloaded as a pdf.

Interactive space-group help The interactive space-group help includes links to articles in International Tables that provide more details about each item.

Additional resources Seven CIF dictionaries as html and pdf Interactive tables – retrieve individual values from long tables or plot different combinations of all the values in a table The text and tables within International Tables Online are supported by a number of resources (such as CIF dictionaries) and interactive features.

All seven CIF dictionaries are available in pdf and html formats.

The interactive version buttons lead to tables of data that have been converted to easy-to-use look-up tables from which individual values can be retrieved using drop-down menus, and in some cases ranges of values can be chosen and plotted against each other.

Availability International Tables Online is available through Wiley Interscience Visit it.iucr.org for more information and a guided tour International Tables Online is available as a full set of all eight volumes through Wiley.