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A near-stoichiometric lithium niobate single crystal has been grown by the Czochralski method in a hanging double crucible with a continuous powder supply system. Twins were found at one of the three characteristic growth ridges of the as-grown crystal. The twin structure was observed and analyzed by transmission synchrotron topography. The image shifts ΔX and ΔY in the transmission synchrotron topograph were calculated for the 3
2 and 0
22 reflections based on results from high-resolution X-ray diffractometry. It is confirmed that one of the {01}m planes is the composition face of the twin and matrix crystals. The formation mechanism of these twins is discussed.
2 and 0
22 reflections based on results from high-resolution X-ray diffractometry. It is confirmed that one of the {01}m planes is the composition face of the twin and matrix crystals. The formation mechanism of these twins is discussed.
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