2/18/2023 0 Comments Chromium element![]() ![]() Viridian, a green pigment produced from chromium(III) oxide, is not toxic and is still used widely in ceramics and glassware. Use of actual lead chromate has declined significantly due to toxicity concerns, but the color is still used, replicated using less toxic alternatives. Lead chromate, the main compound in crocoite, was used to produce a pigment called “chrome yellow”, a color well known due to its widespread use for school buses in the United States and postal vehicles in some European countries. The earliest uses of chromium exploited its compounds. Vauquelin went on to detect traces of chromium in precious gems such as rubies and emeralds, and to hypothesize correctly that chromium gave these gems their brilliant colors. The process he used to isolate pure chromium metal had produced a variety of vibrantly colored solutions and compounds, and it was due to this that Vauquelin’s colleagues had suggested the element be named from chroma, Greek for “color”. ![]() Vauquelin resolved the debate when he was able to isolate a new metallic element, chromium, from the sample, a discovery he reported in the scientific literature the following year. When French chemist Louis Nicolas Vauquelin first received a sample of Siberian red lead in 1797, the mineral-known today as crocoite-had been in use as a pigment for over three decades, but its chemical composition had remained a subject of dispute. American Elements: The Materials Science Company™ | Certified bulk & lab quantity manufacturer of metals, chemicals, nanoparticles & other advanced materials
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |