How Do You Spell PURPLE OF CASSIUS?

Pronunciation: [pˈɜːpə͡l ɒv kˈasɪəs] (IPA)

The phrase "purple of Cassius" refers to a violet-red pigment obtained by mixing gold chloride with tin(II) chloride. Its name comes from Andreas Cassius, who discovered the reaction in the 17th century. Phonetically, "purple" is pronounced as /ˈpɜː.pəl/ with the stress on the first syllable, and "Cassius" is pronounced as /ˈkæs.i.əs/. The spelling of this word is based on the Latinized name of its discoverer, but the pronunciation in English has evolved over time.

PURPLE OF CASSIUS Meaning and Definition

1. Purple of Cassius refers to a reddish-violet pigment that is commonly used in ceramic glazes and glassmaking, primarily during the early stages of its discovery. The term "purple" represents the color of the pigment, while "Cassius" refers to Andreas Cassius, a German pharmacist and chemist who first synthesized this pigment in the 17th century.

   The production process of Purple of Cassius involves the reaction of stannous chloride (tin(II) chloride) with gold chloride or chloroauric acid. When these chemicals are mixed in a solution, they form colloidal particles of gold stannate. These colloidal particles exhibit unique optical properties, resulting in the vibrant reddish-purple color characteristic of Purple of Cassius.

   Due to its attractive hue, Purple of Cassius garnered immense popularity among craftsmen during its initial discovery and was often used to add a touch of elegance and aesthetic appeal to various glassware and ceramics. However, its utilization gradually declined as synthetic pigments with similar characteristics became more readily available. Moreover, its use declined further due to its tendency to fade when exposed to light.

   Despite its limited use today, Purple of Cassius retains its historical significance as one of the earliest synthesized pigments, contributing to the progression of color chemistry and the development of new materials in the field of art and craftsmanship.

2. A compound of the oxides of tin and gold, used in porcelain-painting or enamelling, and in glass-staining.

   Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.

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