Kupfer-nickel

Kupfer-nickel, m. copper-nickel (niccolite). -niederschlag, m. copper precipitate or deposit. -ocher, -ocker, m. = Kupferbraun. 

Beobachtung Relativ edle Metalle wie Kupfer, Nickel und Blei scheiden sicb aus ibren Losungen in Gegenwart von unedlen Metallen wie etwa Magnesium, Zink oder Eisen ab. 

Aus den Systcmen Mu [Kupfer, Nickel, Cobalt], Kalium-dicyanamid und Indazol lassen sich Komplex-Verbind ungen mit anionischen Chelat-Liganden, die durch nukleophile Addition des Indazol-Liganden an koordinativ gebundenes Dicyanamid entstanden sind, isolieren346. 

Nickel is a silver-white, lustrous metal. It was first isolated by Swedish chemist Axel Fredrik Cronstedt in 1751. Cronstedt had been attempting to isolate copper from a mineral called niccolite (the German word kupfer-nickel means Devil s copper or Qld Nick s copper ). He instead found nickel, which he named after the mineral. 

Few minerals resemble copper in appearance one of the best known and most important of these was known to German miners and was used to colour glass green. Although repeatedly worked for copper, that metal could never be extracted from it the doctrine of signatures had broken down. Not that Nature herself was at fault it was the Devil who had deliberately tinted the mineral in order to mislead the poor miner. So the mineral was called Kupfer-nickel, that is false copper, pseudo copper, or, more literally, Old Nick s copper. 

Cobalt has very much in common with nickel, its neighbour in the periodic table. First of all, nickel is also of devilish origin. Its name derives from the German kupfer-nickel ( copper devil ) and belongs to the mineral described in 1694 by the Swedish mineralogist U. Hierne, who mistook it for copper ore. When repeated attempts to smelt copper from it failed, the metallurgists decided that it must have been Nick, the evil spirit of the mountains, at his tricks. 

M45 Nickeline, kupfer-nickel" NiAs in quartz. From Lainijaur in northern Sweden. Collected by Roland Eriksson. 

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