we have had the same case recently - it turned out to be Ca-malonate. It seems that malonate has similar properties as oxalate being insoluble at higher concentrations.
Best wishes Kornelius On Fri, 16 Nov 2007 13:48:49 -0600 Jacob Keller <[EMAIL PROTECTED]> wrote: > Dear Crystallographers, > > I have just found some crystals in a 1 year old screen, and, having been > repeatedly trained to be very skeptical, think that probably they are salt. > So the question: has anybody seen malonate crystals before? I was wondering > whether they could possibly be birefringent, given that the molecular > structure is not chiral. The crystals I see are very birefringent. None of > the other ingredients is chiral either. In general, my understanding had been > that the birefringence was due to the chirality of the > molecules/crystals...is this misguided? > > Jacob > > ******************************************* > Jacob Pearson Keller > Northwestern University > Medical Scientist Training Program > Dallos Laboratory > F. Searle 1-240 > 2240 Campus Drive > Evanston IL 60208 > lab: 847.467.4049 > cel: 773.608.9185 > email: [EMAIL PROTECTED] > ******************************************* ---------------------------------------------- Kornelius Zeth Max Planck Institute for Developmental Biology Dept. Protein Evolution Spemannstr. 35 72076 Tuebingen, Germany [EMAIL PROTECTED] Tel -49 7071 601 323 Fax -49 7071 601 349
