A macrodefect-free langasite (La3Ga5SiO14) crystal 3 inches in diameter was grown along its Z-axis by the Czochralski technique. The grown crystal showed clear faceting on (0001) and (011̄0) faces, forming a hexagonal column shape, and it had minor faceting on (011̄1) in the conical part, making a stepped hexagonal pyramid. Thermal treatment of the melt and uniform interface shape are important to the growth of langasite with stable facet development. Interface instability occurred during the formation of the conical portion of the crystal under a high crystal rotation rate. The homogeneity in composition was investigated two dimensionally by the X-ray Bond diffraction method. The congruent melt composition for langasite is also discussed relative to the stoichiometric composition.
|Number of pages||7|
|Journal||Journal of Crystal Growth|
|Publication status||Published - 2000 Apr 1|
|Event||The 11th American Conference on Crystal Growth and Epitaxy - Tucson, AZ, USA|
Duration: 1999 Aug 1 → 1999 Aug 6