Gahn, Gottlieb Johan

Manganese (Mn, [Ar]3t/S4.v2), name and symbol after the Latin magnesia nigra (black magnesia). Isolated (1774) by the Swedish chemist Johan Gottlieb Gahn. Silvery, hard, brittle metal. 

Manganese - the atomic number is 25 and the chemical symbol is Mn. The name derives from the Latin magnes for magnet since pyrolusite (Mn02) has magnetic properties. It was discovered by the Swedish pharmacist and chemist Carl-Wilhelm Scheele in 1774. Also in 1774, the Swedish chemist Johan Gottlieb Gahn first isolated the metal. 

Johan Gottlieb Gahn, 1745-1818. Swedish chemist, mineralogist, and mining engmeer Manufacturer of copper, sulfur, sulfunc acid, and red ochre Discoverer of metallic manganese... 

Aug. 19, 1745 V. Menghini detects iron in red blood corpuscles. Birth of Johan Gottlieb Gahn, the discoverer of manganese, at Xoxna, South Helsingland, Sweden. 

Johan Gadolin became an expert in the chemistry of the elements known as the lanthanide series of elements. From 1775 to 1779 he studied mathematics, then chemistry, in Abo, Finland. From 1779 to 1782 he studied chemistry in Uppsala, Sweden. He received a master of science degree at the age of twenty-two, in 1782. During his Uppsala years he became friends with the Swedish chemists Carl Wilhelm Scheele (1742-1786) and Johan Gottlieb Gahn (1745-1818). 

Swedish mineralogist Johan Gottlieb Gahn discovers the... 

Cronstedts students further developed blowpipe analysis. One of them was Johan Gottlieb Gahn (1745-1818), who lived and worked in Falun. He was looked upon as the most able blowpipe analyst in the 18 century. His own blowpipe (Figure 10.4) was used by and further developed at the Bergakademie Freiberg in Germany. 

Figure 27.1 Johan Gottlieb Gahn, Carl Wilhelm Scheele and Torbern Bergman (the likeness to the original persons can be questioned). (Reprinted from the booklet Of the meteor family published by AB Ferrolegeringar, Stockholm.

Jan Trofast, Johan Gottlieb Gahn - en bortglomd storhet. In Swedish. [Johan Gottlieb Gahn - a forgotten celebrity], Lund, Sweden, 1996... 

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