| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of producing a multicomponent-based fluoride single crystal free from thermal strains, cracks or the like. SOLUTION: In the method of producing the multicomponent-based fluoride single crystal, a crucible having a lower crucible part 5 and an upper crucible part 1, which is stacked on the lower crucible part 5, is used. At least one hole 3 having a small diameter is opened at the bottom of the upper crucible part 1. The growth by a Bridgman method is carried out while controlling the amount of a raw material to be charged in the crucible so that 10 to 50% of a melt of the raw material is accommodated in the upper crucible part 1 when the raw material is melted. Thus, a generating clouding substance 2 is accumulated in the upper crucible part 1.
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