Tesaurus d'Art i Arquitectura Getty Institute 0000-00-00 2024-01-24 15:40:44 en cobalt300221155Co The metallic element having the symbol Co and atomic number 27; it is a hard, ductile, white metal, resembling nickel but with a bluish instead of a yellow tinge. Cobalt was first identified by Georg Brandt of Sweden in 1735. It has an abundance of 0.001-0.002% in the earth's crust and is found in the minerals smaltite, cobaltite, chloanthite, linnaetite, and erythrite. Metallic cobalt is added to alloys to increase hardness at high temperatures. It is also ferromagnetic. Cobalt oxides and salts are usually blue and they are used as pigments in paints, glass, and ceramic glazes cobalt cobalto 2026-03-30 20:32:39