Where did georg brandt find cobalt

Scientist of the Day - Georg Brandt




Georg Brandt, a Swedish chemist, died Apr. 29, 1768, at age 83. Around 1735, Brandt discovered a new metal, cobalt. There were seven classical metals known to antiquity--gold, silver, iron, copper, lead, tin, mercury--as well as four "semi-metals", known primarily by their oxides or sulfides: zinc, bismuth, antimony, and arsenic. So when Brandt isolated cobalt, he was the first person since prehistory to identify a new metal. One effect of cobalt was well-known--its oxide would color glass blue--but that was thought to be the result of the presence of bismuth. Brandt was able to separate cobalt from bismuth, and prove that the blue color came from the cobalt. Brandt was the first in a long line of Swedish chemists who would discover new elements. Cobalt blue is now a staple of the artist’s palette. It provided the deep blue for Vincent Van Gogh’s Starry Night, and it was especially favored by Maxwell Parish, so much so that cobalt blue is now often referred to as Parish blue.

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George Brant

American playwright

George Brant is an American playwright. Born in Park Ridge, Illinois, he is the author of several award-winning plays, most notably Grounded.[1][2]

Career

Brant completed his undergraduate studies at Northwestern University and received his Masters in Fine Arts in Writing from the Michener Center for Writers at the University of Texas at Austin. He is a member of the Dramatists Guild of America.[3]

His most successful play to date is Grounded, which played at London's Gate Theatre and went on to be directed by Julie Taymor in an off-Broadway production at The Public Theater, which starred Anne Hathaway.[4]Grounded won the National New Play Network's 2012 Smith Prize and a Fringe First award at the 2013 Edinburgh Fringe Festival.[4][5]

In October of 2023, an operatic adaptation of Grounded opened at the Kennedy Center in Washington DC.[6][7] The Kennedy Center's publicity summarizes the opera as "Jess is a hot shot F-16 fighter pilot, an elite w

Georg Brandt

(1694–1768) Swedish chemist

Brandt was the son of an ironworker and former apothecary in Riddarhyta, Sweden, and from an early age he helped his father with metallurgical experiments. He studied medicine and chemistry at Leiden, and gained his MD at Rheims in 1726. He was later made warden of the Stockholm mint (1730), and professor of chemistry at the University of Uppsala.

In 1733 he systematically investigated arsenic and its compounds. He invented the classification of semimetals (now called metalloids), in which he included arsenic, bismuth, antimony, mercury, and zinc.

In 1735 Brandt postulated that the blue color of the ore known as smalt was due to the presence of an unknown metal or semimetal. He named this ‘cobalt rex’ from the Old Teutonic ‘kobold’, originally meaning ‘demon’, later applied to the ‘false ores’ that did not yield metals under the traditional processes. In 1742 Brandt isolated cobalt, and found it was magnetic and alloyed readily with iron. His results were confirmed in 1780 by Torbern Bergman, who first obtained fairly pure cobalt.

Bran

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