How much mismatch? If you're getting a good profile fit, I'd be inclined to doubt that it is a consequence of preferred orientation. You could mix your sample with another material (corundum powder, cork) to try to reduce the degree of preferred orientation, and see if that makes a difference.
Instead of a Le Bail fit, you could try a full Rietveld to see if the powder really is the same phase as the single crystal. One could also imagine that a powder would be more facile in exchanging solvent with the environment, which could affect lattice parameters. On Wed, Feb 5, 2014 at 1:37 PM, Breogan Pato Doldan <breogan.p...@udc.es>wrote: > Dear rietvelders, > > I have carried out the single crystal resolution and the PXRD Le Bail > refinement of a Metal Organic Framework. > The compound crystalizes as needles and there is a clear in-plane > preferred orientation along the c-axis. > There is a mismatch between the single crystal and the Le Bail refinement > data in the lattice parameter c. > Could this mismatch be due to the preferred orientations? > > Regards, > Breogán Pato Doldán, > Fundamental Chemistry Department. > Faculty of Sciences. University of A Coruña > Rúa da Fraga 10, 15008, A Coruña. Spain. > Tel: +34 981167000 ext. 2061 > > > > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Please do NOT attach files to the whole list <alan.he...@neutronoptics.com > > > Send commands to <lists...@ill.fr> eg: HELP as the subject with no body > text > The Rietveld_L list archive is on > http://www.mail-archive.com/rietveld_l@ill.fr/ > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > > -- ************************** Peter W. Stephens Professor, Department of Physics and Astronomy Associate Dean for Curriculum, College of Arts and Sciences Stony Brook University (631) 632-8156 http://mini.physics.sunysb.edu/~pstephens Please update your records to my new email: peter.steph...@stonybrook.edu
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Please do NOT attach files to the whole list <alan.he...@neutronoptics.com> Send commands to <lists...@ill.fr> eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
