Cobalt (III) oxide

Crystal structure
	__ Co 3+ __ O 2−
General
Surname	Cobalt (III) oxide
other names	Cobalt (III) oxide; Cobalt black; Cobalt sesquioxide; Dicobalt trioxide; CI 77323;
Ratio formula	Co 2 O 3
Brief description	gray-black solid
External identifiers / databases
ECHA InfoCard	100,013,779
PubChem	4110762
Wikidata	Q121881
properties
Molar mass	165.86 g mol −1
Physical state	firmly
density	5.7 g cm −3
Melting point	895 ° C (decomposition)
solubility	practically insoluble in water (0.84 mg l −1 at 37 ° C)
safety instructions
H and P phrases	H: 302-317-351
	P: 280
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Cobalt (III) oxide is a chemical compound from the group of oxides of cobalt . The pure form of this compound is not yet known.

Extraction and presentation

Exposure to air, but more quickly with oxidizing agents such as chlorine , bromine or hydrogen peroxide , creates brown cobalt (III) oxide hydrate Co ₂ O ₃ · nH ₂ O in a basic solution of cobalt (II) hydroxide . Cobalt (III) hydroxide leaves Anhydrous cobalt (III) oxide can only be obtained via cobalt hydroxide oxide CoO (OH) under special conditions , although oxygen splitting off and thus the formation of other cobalt oxides such as Co ₃ O ₄ begins before complete dehydration .

properties

Cobalt (III) oxide

Cobalt (III) oxide is a gray-black solid that is practically insoluble in water. At a temperature above 895 ° C, it splits off oxygen, forming cobalt oxides such as Co ₃ O ₄ and CoO.

use

Cobalt (III) oxide as well as the blue cobalt (II) carbonate for the dyeing of glass , porcelain and enamel used.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g Entry on cobalt (III) oxide in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1686.
↑ Erwin Riedel, Christoph Janiak: Inorganic Chemistry . de Gruyter, 2011, ISBN 978-3-11-022566-2 ( page 860 in the Google book search).
^ AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 1554.
^ Karl-Heinz Lautenschläger, Werner Schröter: Taschenbuch der Chemie. 20th edition, Harri Deutsch Verlag, 2007, ISBN 978-3-8171-1761-1 , p. 379 ( limited preview in Google book search).

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g Entry on cobalt (III) oxide in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .

[2] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1686.

[Riedel-3] Erwin Riedel, Christoph Janiak: Inorganic Chemistry . de Gruyter, 2011, ISBN 978-3-11-022566-2 ( page 860 in the Google book search).

[HoWi-4] AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 1554.

[5] Karl-Heinz Lautenschläger, Werner Schröter: Taschenbuch der Chemie. 20th edition, Harri Deutsch Verlag, 2007, ISBN 978-3-8171-1761-1 , p. 379 ( limited preview in Google book search).