how we use cookies

The table below lists the cookies used on the, and web sites, and gives a brief description of their purpose. For more details of the IUCr's privacy policy, click here.

iucr_ref_lookup_yellow, iucr_ref_lookup_orange

Record visitor's preference for displaying hyperlinks to glossary terms in the Online Dictionary of Crystallography (yellow) and IUPAC Gold Book (orange). Persistent cookie.


Session cookie for logging into the Chub database (including World Directory, editors' pages etc.)


Session cookie used when visitors are requesting or paying for vouchers and open-access fees etc. on the site.


Session cookie set by the software we use to manage our web site and essential to its operation. No personal information is stored.


The session id is set when the visitor logs in to publBio. It is unique to that session and ensures that the server sends the appropriate pages to the browser that is hosting the session, and that any data uploaded by the visitor during that session is associated with that particular visitor. When the session is terminated (the visitor logs out or closes the browser), the session id is destroyed.

Third-party cookies

The IUCr web sites also include third-party applications to provide additional functionality to readers. The third parties mentioned below set cookies.


AddThis cookies are set by the social media sharing service AddThis ( which allows visitors to share content via social networking web sites and email.


Crossref uses cookies to give Crossmark access to the current status of journal articles, i.e. whether they have been updated, corrected or retracted, as well as providing access to additional article metadata. To learn more about Crossref's privacy policy, see


The IUCr Facebook page is embedded in a small number of IUCr web pages. To learn more about Facebook's privacy policy, see

Google Analytics

Google Analytics cookies are used to collect information about how visitors use the site. We use the information to help us improve the site. The cookies collect information in an anonymous form, including the number of visitors to the site, where visitors have come to the site from and the pages they visited. To learn more about Google Analytics' privacy policy, see


Cookies are set by Kudos ( as part of its service to help journal authors maximize the impact of their publications.


TrendMD ( cookies allow article recommendations from scholarly sites to be included in our journal articles.


Twitter feeds are included in a number of IUCr web pages to provide extra news and information to readers. To learn more about Twitter's privacy policy, see


YouTube cookies are used in pages with embedded video content. To learn more about YouTube's privacy policy, see

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