METHOD FOR PRODUCING LANGASITE SINGLE CRYSTAL AND LANGASITE SINGLE CRYSTAL

摘要

PROBLEM TO BE SOLVED: To obtain a method for producing a langasite single crystal and a good langasite single crystal free from secondary phases or twin crystals.;SOLUTION: The method for producing the langasite single crystal comprises pulling and growing a single crystal ingot of La₃Ga₅SiO₁₄ from a melt L obtained by melting La₂O₃, Ga₂O₃, and SiO₂ in a crucible 1 made of iridium. The concentration of iridium in the single crystal ingot is adjusted to be ≤10 ppm.;COPYRIGHT: (C)2004,JPO