CrossMark policy

CrossMark is a multi-publisher initiative to provide a standard way for readers to locate the current version of an article or other published content. By applying the CrossMark logo the International Union of Crystallography is committing to maintaining the content it publishes and to alerting readers to changes if and when they occur.

Clicking on the CrossMark logo will tell you the current status of a document and may also give you additional publication record information about the document (e.g. information on content type, peer review, publication history, availability of supplementary materials, and copyright and licencing).