In early 2003, Powder Diffraction and the Denver X-ray Conference (DXC) agreed to a collaboration to publish representative DXC articles in the special June issue of Powder Diffraction. For the past six years, the annual publication of the special June issue has significantly increased the service and the number of articles available to the readers of Powder Diffraction, as well as the circulation of the representative DXC articles for their authors.

Articles published in this special issue were reviewed, edited, and selected by co-editors-in-chief (namely, Thomas Blanton and George Havrilla) and co-editors (John Anzelmo, Vic Buhrke, Tim Elam, John Gilfrich, Jim Kaduk, Scott Misture, Robert Snyder, Brian Toby, and Rene Van Grieken) of Advances in X-ray Analysis. I hope that our readers will find the articles appeared in this issue interesting and useful.

I also want to thank Nicole Ernst, Denise Flaherty, and Carly Bray of ICDD for making sure that everything was in order for this June publication.

Ting C. Huang