Dear Maher, as far as I understand, the anomalous scattering comes from inner shell electrons, not the valence electrons. So while you might notice a slight shift in the peak wavelength, the strength of the signal will only reduce if you crystal order suffered over time, but not from any oxidation of the Se.
Best, Tim On Tue, Jul 01, 2014 at 10:51:20AM -0500, Maher Alayyoubi wrote: > Hi everyone, > > Would anyone know for how long Selenomethionine derivative crystals are > good if kept in plate at RT. In other words, would SE loose its scattering > properties due to oxidation over time? I have SElmet crystals that have > been lying in a plate for 2 months by now so I was wondering if they are > still worthwhile the effort of collecting new data from them. > > Thank you very much, > > > Maher -- -- Dr Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen GPG Key ID = A46BEE1A
signature.asc
Description: Digital signature
