H. Graafsma et al., TOWARDS EXTINCTION-FREE EXPERIMENTAL DIFFRACTION DATA ON AL2O3, Acta crystallographica. Section B, Structural science, 54, 1998, pp. 193-195
Using 58keV (0.214 Angstrom) synchrotron radiation we have obtained vi
rtually extinction-free data on Al2O3 Refinement of a multipole model
against these data produced deformation densities of high quality, whi
ch compare well with theoretical maps.