Acta Crystallographica Section E: Crystallographic Communications is the IUCr's open-access structural communications journal. It provides a fast, simple and easily accessible publication mechanism for crystal structure determinations of inorganic, metal-organic and organic compounds. The electronic submission, validation, refereeing and publication facilities of the journal ensure rapid and high-quality publication. Section E publishes two categories of articles, Research Communications and Data Reports, both of which are peer reviewed. Each publication consists of a complete package – the published article, HTML and PDF supplements, CIF, structure factors, graphics, and any other submitted supporting information. Research Communications are longer articles describing one or more structure determinations with appropriate discussion of the science. Data Reports are extended abstracts reporting individual structure determinations with comments on the chemical significance of the structure.