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cobalt    音標拼音: [k'ob,ɔlt]
n. 鈷,鈷類顏料,由鈷制的深藍色

鈷,鈷類顏料,由鈷制的深藍色

cobalt
n 1: a hard ferromagnetic silver-white bivalent or trivalent
metallic element; a trace element in plant and animal
nutrition [synonym: {cobalt}, {Co}, {atomic number 27}]

Cobalt \Co"balt\ (k[=o]"b[o^]lt; 277, 74), n. [G. kobalt, prob.
fr. kobold, kobel, goblin, MHG. kobolt; perh. akin to G.
koben pigsty, hut, AS. cofa room, cofgodas household gods,
Icel. kofi hut. If so, the ending -old stands for older
-walt, -wald, being the same as -ald in E. herald and the
word would mean ruler or governor in a house, house spirit,
the metal being so called by miners, because it was poisonous
and troublesome. Cf. {Kobold}, {Cove}, {Goblin}.]
1. (Chem.) A tough, lustrous, reddish white metal of the iron
group, not easily fusible, and somewhat magnetic. Atomic
weight 59.1. Symbol Co.
[1913 Webster]

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.
[1913 Webster]

2. A commercial name of a crude arsenic used as fly poison.
[1913 Webster]

{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.
[1913 Webster]

cobalt
Symbol: Co
Atomic number: 27
Atomic weight: 58.993
Light grey transition element. Some meteorites contain small amounts of
metallic cobalt. Generally alloyed for use. Mammals require small
amounts
of cobalt salts. Cobalt-60, an artificially produced radioactive isotope
of Cobalt is an important radioactive tracer and cancer-treatment agent.
Discovered by G. Brandt in 1737.

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  • Cobalt - Wikipedia
    Cobalt is a chemical element; it has symbol Co and atomic number 27 As with nickel, cobalt is found in the Earth's crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron The free element, produced by reductive smelting, is a hard, lustrous, somewhat brittle, gray metal
  • Cobalt | Uses, Properties, Facts | Britannica
    Cobalt, metallic chemical element, one of the transition elements, atomic number 27 The metal is used especially for heat-resistant and magnetic alloys A relatively large percentage of the world’s production goes into magnetic alloys such as the Alnicos for permanent magnets
  • Cobalt Miners News For The Month Of June 2025 - Seeking Alpha
    Cobalt market news - DRC prepares for a new decision on cobalt export ban in June $2 5B in the 2025 Budget Reconciliation Bill for the US production of critical minerals
  • Cobalt (Co) Ore | Properties, Minerals, Occurrence, Deposits
    Cobalt (Co) is a chemical element with the atomic number 27 and an atomic mass of 58 93 g mol It is a hard, brittle, and silver-gray metal that belongs to the transition metals group in the periodic table Cobalt has a high melting point, excellent magnetic properties, and is known for its blue color when used as a pigment in glass and ceramics
  • Cobalt | History, Uses, Facts, Physical Chemical Characteristics
    Cobalt is transition metal and was discovered in pure form in 1735 It is essential part of vitamin B12 Its compounds are known as cobalt blue used to color pottery and glass
  • Cobalt Definition, Facts, Symbol, Discovery, Property, Uses
    Cobalt (pronunciation: KO-bolt) is a hard, lustrous silvery-blue element belonging to the group of transition metals, and it is represented by the chemical symbol Co [1, 2, 3]
  • Understanding Cobalt: Properties, Uses, and Applications
    - Cobalt is a hard, metallic element symbolized as Co with an atomic number of 27 - This transition metal is crucial for various applications, such as rechargeable batteries, superalloys, and pigments - As a metal, it is solid at room temperature, silvery-blue in color, and has magnetic properties
  • Cobalt - American Elements
    Cobalt is found in cobaltite, erythrite, glaucodot and skutterudite ores, but is not found free in nature Cobalt was first discovered by George Brandt in 1732
  • Cobalt (Co) - Definition, Preparation, Properties, Uses, Compounds . . .
    What is Cobalt? Cobalt is a tough, lustrous, silver-gray metallic element that stands out due to its remarkable properties and extensive range of uses, carrying the atomic number 27 It is known for its significant strength and ability to withstand high temperatures and degradation, positioning it as a prime choice for challenging conditions
  • Cobalt - HyperPhysics
    Cobalt is a silvery-white metal, with a slight reddish tinge It occurs in the minerals smaltite and safflorite with the composition CoAs 2 Cobalt also forms an arsenide with the content CoAs 2-3 which is called skutterudite The sulfide mineral cobaltite, CoAsS, also occurs Cobalt is usually found in association with nickel





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