Lamy. Claude-Auguste

Although there seems to be no doubt that Six William Crookes was the first to observe the green line of thallium, many chemical historians, especially the French ones, attribute the isolation of the metal itself to Claude-Auguste Lamy. He was bom on July 15, 1820, at Ndry in the Jura department of France, attended the ficole Normale Supdrieure in Paris, and at the age of thirty-one years received his doctorate from Lille, He taught physics, first at Limoges and later at Lille (16). 

Claude-Auguste Lamy, 1820—1878. President of the SociSte Chimique de France in 1873 The first person to prepare an ingot of metallic thallium. He made a thorough study of its compounds and proved that they are poisonous Author of many papers on optics, electricity, pyrometry, organic and inorganic chemistry, and sugar technology. 

Birth of Claude-August Lamy at Nery, France. He prepared thallium in the metallic state. 

Interestingly, thallium was discovered at almost the same time by French chemist Claude-Auguste Lamy (1820-1878). Lamy discovered thallium the old fashioned way, by separating one of its minerals in the laboratory. For a short time, there was a difference of opinion as to whether Lamy or Crookes was the real ... 

The name comes from thallos, Greek for green twig. It was discovered by William Crookes using spectroscopic analysis, who named it after the color of the spectra line. The metal was isolated by Crookes and independently by Claude-Auguste Lamy (1820-1878) in 1862. The elemental metal does not occur naturally and is extracted as a by-product from refining pyrites, lead, or zinc. In its pure form it is shiny but oxidizes quickly. It resembles lead. The element is toxic and should be handled carefully. It primary commercial use is in rodent poison and ant killer, as well as in photo cells. 

In April 1862, Claude August Lamy independently obsenved the same green line due to thallium in the spectrum obtained from slime from a sulphuric acid works at Loos, where Belgian pyrites were used. More fortunate than Crookes he had considerable quantities of material at his disposal and soon established the metallic nature of thallium. In May of the same year hq was able to display a lump of the metal and before the end of the year he isolated several hundred grams and gave a fairly complete account of the physical and chemical properties of the metal. ... 

British chemist Sir William Crookes first discovered thallium (Tl) in 1861 while doing spectroscopy on tellurium. He saw beautiful green lines in some leftover waste material from a factory that made sulfuric acid and named the element after the Latin word thallos, meaning budding green twig. It was later isolated in 1862 independently by both Sir William Crookes and Claude-Auguste Lamy. 

Compt. Rend., 1862, liv, 1255 (read 16 May by Dumas) Ann. Chim., 1862, Ixvii, 385 Chem. News, 1863, vi, 14. Claude Auguste Lamy (Nery, Jura, 15 July 1820-Paris, 20 March 1878), professor of physics in Lille and (1865) of chemistry in the ficole Centrale des arts et manufactures in Paris. 

Claude-Auguste Lamy (1820-1878), an eminent French scientist, also investigated the slime from a lead chamber process and discovered too the characteristic green spectral line. Yet it was not until March 1862, and it seemed clear that Crookes had beaten him to it. 

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