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.

iucrshowyellow, iucrshoworange

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.


This is used to store a visitor's preferred 3d viewer application when the visitor explicitly expresses a preference. Persistent cookie.

Third-party cookies

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Google Analytics cookies, 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

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

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