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D-LACBED montage from Al2O3



These images show a montage of Digitally reconstruced Large Angle Convergent Beam Electron Diffraction (D-LACBED) patterns from a single crystal of sapphire, Al2O3. The data is inverted and a colour cast has been applied. These patterns are very sensitive to crystal symmetry; the symmetry of the whole pattern is 2mm while individual patterns have symmetries of 2mm and 2.