1. (Chem.)
Defn: A tough, lustrous, reddish white metal of the iron group, not easily fusible, and somewhat magnetic. Atomic weight 59.1. Symbol Co.
Note: It occurs in nature in combination with arsenic, sulphur, and oxygen, and is obtained from its ores, smaltite, cobaltite, asbolite, etc. Its oxide colors glass or any flux, as borax, a fine blue, and is used in the manufacture of smalt. It is frequently associated with nickel, and both are characteristic ingredients of meteoric iron.
2. A commercial name of a crude arsenic used as fly poison. Cobalt bloom. Same as Erythrite. — Cobalt blue, a dark blue pigment consisting of some salt of cobalt, as the phosphate, ignited with alumina; — called also cobalt ultramarine, and Thenard's blue. — Cobalt crust, earthy arseniate of cobalt. — Cobalt glance. (Min.) See Cobaltite. — Cobalt green, a pigment consisting essentially of the oxides of cobalt and zinc; — called also Rinman's green. — Cobalt yellow (Chem.), a yellow crystalline powder, regarded as a double nitrite of cobalt and potassium.
COBALTIC
Co*balt"ic (; 74), a. Etym: [Cf. F. cobaltique.] (Chem.)
Defn: Pertaining to, derived from, or containing, cobalt; — said especially of those compounds in which cobalt has higher valence; as, cobaltic oxide. Luteo-cobaltic compounds (Chem.), an extensive series of complex yellow compounds of ammonia and cobaltic salts. — Roseo-cobaltic compounds (Chem.), an extensive series of complex red compounds of cobalt and ammonia. Modifications of these are the purpureo-cobaltic compounds.
COBALTIFEROUS
Co`balt*if"er*ous, a. Etym: [Cobalt + -ferous.] (Min.)
Defn: Containing cobalt.
COBALTINE; COBALTITE
Co"balt*ine, Co"balt*ite n. (Min.)
Defn: A mineral of a nearly silver-white color, composed of arsenic, sulphur, and cobalt.