Method for producing single crystals of anhydrous sodium sulfide.

摘要

Disclosed are single crystals of anhydrous sodium sulfide, and a method of producing single crystals of anhydrous sodium sulfide, characterized in that the method comprises concentrating an aqueous solution of sodium sulfide at a temperature of 97 DEG C or higher, the solution containing about 2 to about 15% by weight of NaOH based on the aqueous solution, to precipitate single crystals of anhydrous sodium sulfide from the aqueous solution. Fig. 1 is a curve showing the solubility of hydrates of Na2S.