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Single registration system for IUCr online services

The IUCr has brought several of its online services for users, including the World Directory of Crystallographers (WDC) and e-mail alerting for IUCr journals, under a new simple single registration system at In the future, other services such as online submission and review for IUCr journals and subscription to IUCr mailing lists and discussion forums will also be accessible via this system. Each user needs to register information such as their name and e-mail address only once (whether they use all, or only some, of the above servces), and can simply and easily keep their own information up to date.

Every registered user is given a unique identifier (their IUCr ID), which can for instance, be optionally included in articles submitted to all IUCr journals. In future, this may, for example, allow a permanent link to be maintained between an article published online and the up-to-date contact and biographical information for each of its authors that exists in the WDC.

Please note: readers who were in the 10th edition of the WDC but have not checked their entry are urged to log in at the above address using their IUCr ID and password. Please direct any queries to