electronic reprint Journal of Applied Crystallography ISSN 1600-5767 Self-organization of Fe clusters on mesoporous TiO 2 templates Patrick Ziegler, Neelima Paul, Peter M¨ uller-Buschbaum, Birgit Wiedemann, Wolfgang Kreuzpaintner, Jaru Jutimoosik, Rattikorn Yimnirun, Annette Setzer, Pablo Esquinazi, Peter B¨ oni and Amitesh Paul J. Appl. Cryst. (2014). 47, 1921–1930 Copyright c  International Union of Crystallography Author(s) of this paper may load this reprint on their own web site or institutional repository provided that this cover page is retained. Republication of this article or its storage in electronic databases other than as specified above is not permitted without prior permission in writing from the IUCr. For further information see http://journals.iucr.org/services/authorrights.html Many research topics in condensed matter research, materials science and the life sci- ences make use of crystallographic methods to study crystalline and non-crystalline mat- ter with neutrons, X-rays and electrons. Articles published in the Journal of Applied Crys- tallography focus on these methods and their use in identifying structural and diffusion- controlled phase transformations, structure-property relationships, structural changes of defects, interfaces and surfaces, etc. Developments of instrumentation and crystallo- graphic apparatus, theory and interpretation, numerical analysis and other related sub- jects are also covered. The journal is the primary place where crystallographic computer program information is published. Crystallography Journals Online is available from journals.iucr.org J. Appl. Cryst. (2014). 47, 1921–1930 Patrick Ziegler et al. · Self-organization of Fe clusters