International Tables for Crystallography

Advanced search help

This page gives information on using the search facilities of International Tables Online. To go back to the advanced search page click here.
If you have any queries about the search system, please contact

Basic searching

To enter a query, just type in a few descriptive words and hit the 'enter' key (or click on the Search button) for a list of relevant articles. As only articles that contain all the words in your query are returned, refining your search is as simple as adding more words to the search terms you have already entered.

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Phrase searching

Search for complete phrases by enclosing them in quotation marks. Words enclosed in double quotes ("like this") will appear together in all results exactly as you have entered them. For example, to find articles containing the phrase thermal conductivity, your search should be as follows:

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Boolean searching

Searching with the logical "AND", "OR" and "NOT" operators is supported. In addition, search terms can be clustered using brackets (). For example, to find articles about thermal conductivity and metal that do not include the words isotope or impurity, you could use the following query:

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Word variations (wild cards and stemming)

Searches using wild cards and stemming are supported:
  • Wild cards. The wild card "*" may be added to search terms. For example, searching for "crystal*" will return results for articles on "crystallography", "crystallization", "crystals" etc.
  • Stemming. This option can be selected by checking the "Use stemming" box. The stemming algorithm takes the search term and removes common suffixes, such as plurals and "ing" endings, as well as some other English language structures such as "tional" (as in "rotational", where the root is "rotation").
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Exclusion of common words

Common words and characters such as "a" and "now", as well as some single digits and single letters, are excluded from searches as they tend to slow down searches without improving the results.

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Search by volume

As a default, all searches are carried out against all volumes available from International Tables Online. You may also select single volumes or combinations of volumes for your search. If you are using a PC, volumes can be selected by holding down the <Control> key; on a MAC hold down the <Option> key. There is also an option to search on all volumes and Crystallography Journals Online.

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Sorting of results

Articles are sorted by a relevance index, which takes a number of factors into account including the prominence of the search term in an article and the type of article.

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Search terms are highlighted in the results.

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Number of results

You can view 5, 10, 20, 50 or 100 records per page.

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Crystallographic symmetry groups

Information on crystallographic symmetry groups can be retrieved by number or by symbol.

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