A block of electrolytically refined cobalt (99.9% purity) cut from a large plate
The succinate dehydrogenase complex showing several cofactors, including flavin, iron–sulfur centers, and heme.
Cobalt(II) chloride hexahydrate
A simple [Fe2S2] cluster containing two iron atoms and two sulfur atoms, coordinated by four protein cysteine residues.
Structure of tetrakis(1-norbornyl)cobalt(IV)
The redox reactions of nicotinamide adenine dinucleotide.
Early Chinese blue and white porcelain, manufactured c. 1335
Cobalt ore
World production trend
Cobalt prices February and March 2021 (USD$ per ton)
Cobalt prices 2016 to 2021 5 years (USD$ per ton)
Cobalt blue glass
Cobalt-colored glass
alt=chemical diagram of cobalamin molecule|Cobalamin
alt=two cobalt-deficient sheep facing away from camera|Cobalt-deficient sheep

Cobalt is the active center of a group of coenzymes called cobalamins.

- Cobalt

In humans this list commonly includes iron, magnesium, manganese, cobalt, copper, zinc, and molybdenum.

- Cofactor (biochemistry)
A block of electrolytically refined cobalt (99.9% purity) cut from a large plate

3 related topics

Alpha

Molar volume vs. pressure for α iron at room temperature

Iron

Chemical element with symbol Fe and atomic number 26.

Chemical element with symbol Fe and atomic number 26.

Molar volume vs. pressure for α iron at room temperature
Low-pressure phase diagram of pure iron
Magnetization curves of 9 ferromagnetic materials, showing saturation. 1.Sheet steel, 2.Silicon steel, 3.Cast steel, 4.Tungsten steel, 5.Magnet steel, 6.Cast iron, 7.Nickel, 8.Cobalt, 9.Magnetite
A polished and chemically etched piece of an iron meteorite, believed to be similar in composition to the Earth's metallic core, showing individual crystals of the iron-nickel alloy (Widmanstatten pattern)
Ochre path in Roussillon.
Banded iron formation in McKinley Park, Minnesota.
Pourbaix diagram of iron
Hydrated iron(III) chloride (ferric chloride)
Comparison of colors of solutions of ferrate (left) and permanganate (right)
Blue-green iron(II) sulfate heptahydrate
The two enantiomorphs of the ferrioxalate ion
Crystal structure of iron(II) oxalate dihydrate, showing iron (gray), oxygen (red), carbon (black), and hydrogen (white) atoms.
Blood-red positive thiocyanate test for iron(III)
Iron penta- carbonyl
Prussian blue
Iron harpoon head from Greenland. The iron edge covers a narwhal tusk harpoon using meteorite iron from the Cape York meteorite, one of the largest iron meteorites known.
The symbol for Mars has been used since antiquity to represent iron.
The iron pillar of Delhi is an example of the iron extraction and processing methodologies of early India.
Iron sickle from Ancient Greece.
Coalbrookdale by Night, 1801. Blast furnaces light the iron making town of Coalbrookdale.
"Gold gab ich für Eisen" – "I gave gold for iron". German-American brooch from WWI.
Iron powder
Iron furnace in Columbus, Ohio, 1922
17th century Chinese illustration of workers at a blast furnace, making wrought iron from pig iron
How iron was extracted in the 19th century
This heap of iron ore pellets will be used in steel production.
A pot of molten iron being used to make steel
Iron-carbon phase diagram
Photon mass attenuation coefficient for iron.
Structure of Heme b; in the protein additional ligand(s) would be attached to Fe.
A heme unit of human carboxyhemoglobin, showing the carbonyl ligand at the apical position, trans to the histidine residue

Particles of magnetite were extensively used in magnetic recording media such as core memories, magnetic tapes, floppies, and disks, until they were replaced by cobalt-based materials.

Metalloproteins are a group of proteins with metal ion cofactors.

A vitamin B12 solution (hydroxocobalamin) in a multi-dose bottle, with a single dose drawn up into a syringe for injection. Preparations are usually bright red.

Vitamin B12

Water-soluble vitamin involved in metabolism.

Water-soluble vitamin involved in metabolism.

A vitamin B12 solution (hydroxocobalamin) in a multi-dose bottle, with a single dose drawn up into a syringe for injection. Preparations are usually bright red.
A blister pack of 500 µg methylcobalamin tablets
Methylcobalamin (shown) is a form of vitamin B12. Physically it resembles the other forms of vitamin B12, occurring as dark red crystals that freely form cherry-colored transparent solutions in water.
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It is required by animals, which use it as a cofactor in DNA synthesis, in both fatty acid and amino acid metabolism.

Vitamin B12 is a coordination complex of cobalt, which occupies the center of a corrin ligand and is further bound to a benzimidazole ligand and adenosyl group.

Archaea

Archaea (singular archaeon ) constitute a domain of single-celled organisms.

Archaea (singular archaeon ) constitute a domain of single-celled organisms.

Archaea were found in volcanic hot springs. Pictured here is Grand Prismatic Spring of Yellowstone National Park.
The ARMAN are a group of archaea recently discovered in acid mine drainage.
Membrane structures. Top, an archaeal phospholipid: 1, isoprene chains; 2, ether linkages; 3, L-glycerol moiety; 4, phosphate group. Middle, a bacterial or eukaryotic phospholipid: 5, fatty acid chains; 6, ester linkages; 7, D-glycerol moiety; 8, phosphate group. Bottom: 9, lipid bilayer of bacteria and eukaryotes; 10, lipid monolayer of some archaea.
Bacteriorhodopsin from Halobacterium salinarum. The retinol cofactor and residues involved in proton transfer are shown as ball-and-stick models.
Sulfolobus infected with the DNA virus STSV1. Bar is 1 micrometer.
Archaea that grow in the hot water of the Morning Glory Hot Spring in Yellowstone National Park produce a bright colour
Methanogenic archaea form a symbiosis with termites.

Methanogenesis involves a range of coenzymes that are unique to these archaea, such as coenzyme M and methanofuran.

In mineral processing, acidophilic archaea display promise for the extraction of metals from ores, including gold, cobalt and copper.