purple of Cassius

American  

[kash-uhs, kash-ee-uhs, kah-see-uhs] / ˈkæʃ əs, ˈkæʃ i əs, ˈkɑ si əs /

noun

1. a purple pigment precipitated as a sol by the interaction of gold chloride and a solution of stannic acid and stannous chloride: used chiefly in the manufacture of ruby glass, ceramic glazes, and enamels.

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Etymology

Origin of purple of Cassius

1830–40; named after A. Cassius, 17th-century German physician

Example Sentences

CoO, or smalt, gives blue; uranium oxide, green; a mixture of Au and Sn of uncertain composition, called the "purple of Cassius," gives purple.

From An Introduction to Chemical Science by Williams, Rufus Phillips

The purple of Cassius, in place of flux No. 3, flux No. 1 is mixed with it.

From Young's Demonstrative Translation of Scientific Secrets by Young, Daniel

At one time, indeed, a gold compound known as purple of Cassius was so employed, but this soon became obsolete on the introduction of madder purple.

From Field's Chromatography or Treatise on Colours and Pigments as Used by Artists by Salter, Thomas