抄録
Conditions and process of hydrothermal growth of As2S3 crystals were examined. Although it has been known that As2S3 is quite soluble only in alkaline solutions, it was found in this study that it is also soluble in weakly acid solution, as well as in neutral solution. As2S3 crystals usually grew in the form of spherulitic aggregation regardless of the growth conditions and the chemical species in the solvents. The process of spherulite formation is discussed. The crystals grown from an H20 solvent gave a=11.394±0.009Å, b=9.581±0.008Å, c=4.267±0.004Å, β=90°03′±6′, V=465.8±0.5Å3.
