“persulphide”的英文意思_释义_用法

单词

persulphide

释义

persulphide Chem.|pəˈsʌlfaɪd|
[per- 5.]
That sulphide of any element or basic radical which contains the greatest proportion of sulphur. Originally called persulphuret. Now usually more definitely named, as trisulphide, pentasulphide, etc.; e.g. persulphide or persulphuret of arsenic, or arsenious sulphide = arsenic trisulphide, As₂S₃.
1856Miller Elem. Chem. II. 585 Persulphide of Hydrogen (HS₅?)—In order to procure this compound it is usual to prepare first a persulphide of calcium (CaS₅), which may be formed by boiling equal weights of slacked lime and powdered sulphur in water.

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