COBALT(II) OXIDE

Cobalt(II) oxide
Cobalt(II) oxide
General
Systematic name	Cobalt(II) Oxide
Other names	Cobaltous Oxide, Cobalt Monoxide, Cobaltous Monoxide
Molecular formula	CoO
Molar mass	74.93 g/mol
Appearance	A black powder
CAS number	1307-96-6
Properties
Density and phase	6.1 g/cm3
Solubility in water	practically insoluble in water, soluble in strong acids
Melting point	1933°C (2206 K)
Boiling point	?°C (? K)
Hazards
MSDS	(Use CAS#) Fisher Scientific
Main hazards	Respiratory tract inflammation possibly carcinogenic
NFPA 704
R/S statement	R: 22 43 50-53 S: (2-)24-37-60-61
RTECS number	GG2800000
Related compounds
Other anions	Cobalt(II) chloride
Other cations	?
Related compounds	Cobalt(III) oxide
Except where noted otherwise, data are given for materials in their standard state (at 25°C, 100 kPa)

'Cobalt(II) oxide' is a olive green powder, that used extensively in the ceramics industry as an additive to create blue colored glazes and enamels as well as in the chemical industry for producing cobalt(II) salts. CoO crystals have periclase (rock salt) structure with a lattice constant of 4.2615Å^[1].
cobalt(II)oxide obtained from cobalt nitrate in 300°C, also Cobalt(II) oxide is a product of Cobalt(III) Oxide decomposing at 895 °C through the reaction:
:2 Co₃O₄ → 6 CoO + O₂

Contents

Ceramics

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Ceramics

Cobalt(II) Oxide has for centuries used as a coloring agent on kiln fired pottery, the earliest examples go back to 12th century German pottery.^[2]The additive provides a deep shade of blue named Cobalt Blue.
1. Phys. Rev. B '35' 6847 http://link.aps.org/abstract/PRB/v35/p6847
2. Zamek, Jeff: "A Problem With Cobalt?" ''Ceramics Today'' http://www.ceramicstoday.com/articles/zamek_cobalt.htm

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