![]() ![]() Ĭobalt(II,III) oxide is used as an electrode in some lithium-ion batteries, possibly in the form of cobalt oxide nanoparticles.Ĭobalt compounds are potentially poisonous in large amounts. These reaction are described by the following equilibrium:Ģ Co 3O 4 ⇌ 6 CoO + O 2 Applications Ĭobalt(II,III) oxide is used as a blue coloring agent for pottery enamel and glass, as an alternative to cobalt(II) oxide. Melting point is the temperature at which a substance changes from solid to liquid state. Tetrahedral coordination geometry of Co(II)ĭistorted octahedral coordination geometry of Co(III)ĭistorted tetrahedral coordination geometry of OĬobalt(II) oxide, CoO, converts to Co 3O 4 upon heating at around 600–700 ☌ in air. Cr3C2 possesses a low melting point (melting points of WC, Cr3C2, and Co are 2776, 1810 1, and 1495 C 46, respectively) and can tolerate a high degree of. Metallic cobalt occurs as two crystallographic structures: hcp and fcc. Cobalt has a relative permeability two-thirds that of iron. The Curie temperature is 1,115 ☌ (2,039 ☏) and the magnetic moment is 1.61.7 Bohr magnetons per atom. Physical Properties Melting Point: 1495 C 2723 F 1768 K Boiling Point: 2927 C 5301 F 3200 K Density: 8.86 g cm Phase at Room Temperature: solid. ![]() 7 As its wide application in biomedical industry indicates, Co-Cr alloys are well known for their biocompatibility. Cobalt is a ferromagnetic metal with a specific gravity of 8.9. Cobalt Specific Heat, Latent Heat of Fusion, Latent Heat of Vaporization. When considered as the temperature of the reverse change from liquid to solid, it is referred to as the freezing point or crystallization point. Structure Ĭo 3O 4 adopts the normal spinel structure, with Co 2+ ions in tetrahedral interstices and Co 3+ ions in the octahedral interstices of the cubic close-packed lattice of oxide anions. CoCr has a melting point around 1,330 ☌ (2,430 ☏). The melting point of a substance depends on pressure and is usually specified at standard pressure. As a mixed valence compound, its formula is sometimes written as Co IICo III 2O 4 and sometimes as CoO It is one of two well characterized cobalt oxides. Cobalt(II,III) oxide is an inorganic compound with the formula Co 3O 4. ![]()
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