| 单词 |
Scheele's green |
| 释义 |
Scheele's green Chem.|ˈʃeɪləz griːn|
[f. the name of Karl Wilhelm Scheele (1742–1786), German-born Swedish chemist, who first prepared it.]
A hydrated form of copper arsenite, Cu3(AsO3)2.xH2O, formerly used as a pigment in calico printing and wallpaper manufacture.
1819W. T. Brande Man. Chem. v. 274 Mixed with a solution of sulphate of copper, a precipitate of a fine apple-green colour falls, called from its discoverer, Scheele's green, and useful as a pigment. 1935Discovery Sept. 261/2 The dark green background of a so-called Holbein portrait was recently found, on..analysis.., to consist of Scheele's green, a copper arsenate discovered in 1778. 1967Jrnl. Colour Group 92/2 Scheele's green and emerald green, both copper arsenates, lost their popularity [with artists] because of their poisonous effects. 1973J. D. Smith in J. C. Bailar et al. Comprehensive Inorg. Chem. II. xxi. 609 Yellow silver arsenite..and copper arsenite (Scheele's green) may be precipitated from neutral solutions. |
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