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Cobalto

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Cobalto

  1. 1. 27CoCOBALTO- COBALTMASS: 58.933195 u1s22s22p63s23p64s23d7MELTING POINT: 1768 KBOILING POINT: 3200 KDENSITY: 8.90 g·cm−3DISCOVERY: 1735 (Georg Brandt)Cobalt-based blue pigments (cobalt blue) have been used since ancienttimes for jewelry and paints, and to impart a distinctive blue tint to glass.Today, some cobalt is produced specifically from various metallic-lusteredores, of copper and nickel mining. Cobalt is used in the preparationof magnetic, wear-resistant and high-strength alloys. Cobalt silicate andcobalt(II) aluminate give a distinctive deep blue colorto glass, smalt, ceramics, inks... Cobalt occurs naturally as only one stableisotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, usedas a radioactive tracer and in the production of gamma rays.

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