Vauquelin, Louis-Nicola

Vauquelin (1798) Vauquelin, Louis-Nicolas Second memoir on the metal contained in the red lead of Siberia Philosophical Magazine 1 (1798) 361-367... 

Louis-Nicolas Vauquelin (1763-1829) discovered the element in the semiprecious stone beryl. 

Historically, chromium ore was known as Siberian red lead, which was used to make bright red paints. The source was soon identified as the mineral crocoite, and analysis indicated that it also contained lead. In 1797 the French chemist Louis-Nicolas Vauquelin (1763—1829) discovered chromium while studying some minerals that were collected in Siberia. To isolate the pure metal from its oxide, he first dissolved the lead out of the mineral with hydrochloric acid (HCl), leaving crystals of chromium oxide, which he then heated. To his surprise he ended up with crystals of pure chromium metal. 

French chemist Louis-Nicolas Vauquelin Rare alkaline-earth metal derived from the mineral beryl of which emeralds and aquamarines are crystals. 

Louis-Nicolas Vauquelin (1763-1829) discovered the pink compound tetraamminepalladium(II) tetrachloropalladate(II), [Pd(NH3)4][PdCl4].14 This compound, which contains coordinated palladium in both the cation and the anion, is still known as Vauquelin s Salt after its discoverer. The corresponding platinum compound, [Pt(NH3)4][PtCl4], was discovered by Heinrich Gustav Magnus (1802—1870).15 It constitutes the first discovered platinum ammine and is known as Magnus ... 

Beryllium was discovered by French chemist Louis-Nicolas Vauquelin (1763—1829) in 1798. Vauquelin su ested the name glucinium, meaning sweet tasting, for the element because the element and some of its compounds have a sweet taste. The name beryllium was adopted officially in 1957. 

Chromium was discovered in 1797 by French chemist Louis-Nicolas Vauquelin (1763-1829). The element s name comes from the Greek word chroma, meaning color, because chromium compounds are many different colors. 

French chemist Louis-Nicolas Vauquelin discovers chromium. 

Beryllium was discovered in 1798 by a chemist from France named Louis-Nicolas Vauquelin (1763-1829). Vauquelin was researching the mineral beryl. He discovered that beryl is the principal source of beryllium. Emeralds, along with the blue gem aquamarine, are crystals formed from beryl. 

Chromium was first identified in 1797 by the French chemist Louis-Nicolas Vauquelin, who isolated it from crocoite, a mineral also called Siberian red lead. The name for chromium is taken from the Greek chroma, which means color. This is a fitting name, because chromium compounds are often found in vividly colorful shades of green, red, or yellow. As such, chromium compounds historically have found extensive use as pigments for paints. In contrast, elemental chromium is a shiny, hard, yet brittle, steel-gray metal. Since chromium is not found naturally in its free elemental state, it is usually extracted from chromite, FeCr204. 

The works performed by Antoine Francois de Fourcroy (1755-1809), Louis Nicolas Vauquelin (1763-1829), Joseph Louis Proust (1754-1826) and Jons Jakob Berzelius (1779-1848) introduced new concepts in chemistry. Gay-Lussac published his Law of Combining Volumes in 1809, the year after John Dalton (1766-1844) had proposed his Atomic Theory of Matter around 1803. It was left to Amedeo Avogadro (1776-1856) to take the first major step in rationalizing Gay-Lussac s results two years later. 

The haul in succeeding decades was not quite as rich, but the number of elements continued to mount. Berzelius discovered four more elements, for instance selenium, silicon, zirconium, and thorium. (See Figure 12.) Louis Nicolas Vauquelin in 1797 discovered beryllium. 

Louis-NIcolas Vauquelin (1763-18 29) was a multifaceted scientist He also discovered chromium In a lead ore from Siberia, and beryllium in beryl. In 1806, along with Pierre-Jean Robiquet (1780-1840), he isolated the first amino acid, asparagine, from asparagus. 

In 1807, Gaspare CerioU, Professor at the Lyceum in Cremona, reported on an Olio essentiale (an essential oil), which he had obtained by distillation of aqueous tobacco extracts, and two years later, the well-known French chemist Louis-Nicolas Vauquelin (1763-1829) described the preparation ofthe Essence de Tabac . In 1828, the chemist Karl Ludwig Reimann (1804-1872) and the physician Wilhelm Heinrich Posselt (1806-1877) delivered a paper About tobacco, its chemistry and physiology at the University of Heidelberg, in which they described the isolation of the alkaloid nicotine and its toxic effect on dogs and rabbits. 

Chromium was discovered by Louis Nicolas Vauquelin in France in 1797. There was litde use of chromium in organic chemistry until the mid-twentieth century. Much of this work was initiated by Prof. E.O. Fischer in Munich, Germany. His discovery of the preparation of arene (Cr(C03)) complexes lead to him sharing the Nobel Prize in Chemistry in 1973 with Prof. Geoffrey Wilkinson of the United Kingdom. 

Louis Nicolas Vauquelin (Saint-Andree d Hebertat, nr. Pont I Eveque, Normandy 16 May 1763-14 November (or October) 1829), f irm... 

Nicolas Louis Vauquelin (1763-1829) discovers the element during the analysis of Siberian red lead ore J (PbCr04). 

Chromium - the atomic number is 24 and the chemical symbol is Cr. The name derives from the Greek chroma for color , from the many colored compounds of chromium. It was discovered in 1797 by tihe French chemist and pharmacist Nicolas-Louis Vauquelin. Vauquelin also isolated... 

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