Hi all, The discussion about the DuPont Powder Challenge is continuing at the SDPD Web Forum : http://pcb4122.univ-lemans.fr/forum/ under the title "Chemical analysis of the year". All the best, Armel Le Bail - Universite du Maine, Laboratoire des Fluorures, CNRS ESA 6010, Av. O. Messiaen, 72085 Le Mans Cedex 9, France http://www.cristal.org/