Spiral Powder Overlays
نویسنده
چکیده
Spiral overlays, for use with powder diffraction patterns and diffraction spacing profiles, can be at once forgiving of uncertainties in camera constant calibration and (once these are dealt with) sensitive to very small differences in lattice parameter. By facilitating comparison of different lattices in a common physical metric (namely a diffraction experiment of fixed camera constant and scattering center density), their pedagogical value also extends to the comparison of crystal structures whose atomic environments share physical features (like nearest neighbor distances) in spite of major differences in symmetry. The overlays can be put onto transparencies for use directly with negatives and hardcopy, or in digital form for use with digitized images [1].
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تاریخ انتشار 2004