Uncle Al wrote: > > Uncle Al needs a little help from x-ray crystallography adepts. [snip] Armel Le Bail Universite du Maine Laboratoire des Fluorures has generously and magnificently provided the data. Thank you! -- Uncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) "Quis custodiet ipsos custodes?" The Net!