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Georg Brandt (26 June 1694 – 29 April 1768) [1] [2] was a Swedish chemist and mineralogist who discovered cobalt c. 1735. He was the first person to discover a metal unknown in ancient times. [3] [4] He is also known for exposing fraudulent alchemists operating during his lifetime. [5]
[69]: 153 He showed that compounds of cobalt metal were the source of the blue color in glass, which previously had been attributed to the bismuth found with cobalt. Cobalt became the first metal to be discovered since the pre-historical period.
The chemical elements were discovered in identified minerals and with the help of the identified elements the mineral crystal structure could be described. One milestone was the discovery of the geometrical law of crystallization by René Just Haüy , a further development of the work by Nicolas Steno and Jean-Baptiste L. Romé de l'Isle (the ...
It combined cobalt(II) oxide with aluminum(III) oxide at 1200 °C. It was also used as colorant, particularly in blue glass and as the blue pigment used for centuries in Chinese blue and white porcelain, beginning in the late eighth or early ninth century. [15] Cobalt glass, or Smalt, is a variation of cobalt blue. It is made of ground blue ...
The two discovered a new element in a molybdenum sample that was used in a cyclotron, the first element to be discovered by synthesis. It had been predicted by Mendeleev in 1871 as eka-manganese. [171] [172] [173] In 1952, Paul W. Merrill found its spectral lines in S-type red giants. [174]
Artists throughout history—from Vermeer and Klimt to Miro and Mondrian—have used the color extensively. In fact, 20th-century French artist Yves Klein loved the shade so much that he patented ...
Cobalt blue (CoAl 2 O 4) was first described in 1777; it is extremely stable and has been traditionally used as a coloring agent in ceramics. [ 1 ] [ 8 ] [ 9 ] [ 10 ] Ultramarine ( Na 7 Al 6 Si 6 O 24 S 3 ) was made by grinding the forbiddingly expensive lapis lazuli into a powder until a cheaper synthetic form was invented in 1826 by the ...
When discovered, one of the radiographers picked up the source with his bare hand to return it to its container, receiving a localized dose of 3,000–7,000 rad (30–70 Gy) to his hand. All three suffered whole body doses of 10–300 rad (0.10–3.00 Gy) from sleeping in the vehicle containing the unshielded source.
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