Cobalt molybdate

Structural formula
General
Surname	Cobalt molybdate
other names	Cobalt (II) molybdenum oxide; Cobalt (II) molybdate; Cobalt (II) molybdenum (VI) oxide;
Molecular formula	CoMoO 4
Brief description	odorless solid
External identifiers / databases
EC number	237-358-4
ECHA InfoCard	100,033,948
PubChem	61675
Wikidata	Q16677449
properties
Molar mass	218.87 g mol −1
Physical state	firmly
density	4.69 g cm −3
Melting point	1040 ° C
solubility	slightly soluble in water
safety instructions
H and P phrases	H: 334-360-319-317-351-410-335
	P: 285-201-261-273-280-281-305 + 351 + 338-304 + 340-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Cobalt molybdate is an inorganic chemical compound of cobalt from the group of molybdates .

Occurrence

Cobalt molybdate occurs naturally in the form of the mineral pateraite .

Extraction and presentation

Cobalt molybdate can be obtained by reacting cobalt (II) nitrate and ammonium orthomolybdate .

{\ displaystyle \ mathrm {Co (NO_ {3}) _ {2} + (NH_ {4}) _ {2} MoO_ {4} \ \ longrightarrow {} \ CoMoO_ {4} \ downarrow \ + \ 2 \ NH_ {4} NO_ {3}}}

properties

Cobalt molybdate is a purple, odorless solid that is sparingly soluble in water. It has a monoclinic crystal structure with the space group C 2 / m (space group no. 12) . At high pressures it changes into a different crystal structure (β-form). This has a crystal structure with the space group P 2 / c (space group no. 13) . It also occurs in a hydrate form which has a triclinic crystal structure with the space group P 1 (space group no. 2) . The low-temperature form is green-black in color, while the high-temperature form is purple. The phase transition takes place at around 430 ° C. Template: room group / 12 Template: room group / 13 Template: room group / 2

use

Cobalt molybdate is a very important component of industrial catalysts and is used in the gas or liquid hydrodesulfurization of gasoline , for example .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g data sheet Cobalt (II) molybdenum oxide, 99.9% (metals basis), Ni 0.5% max from AlfaAesar, accessed on July 10, 2016 ( PDF )(JavaScript required) .
^ ^A ^b G. W. Smith, JA Ibers: The crystal structure of cobalt molybdate CoMoO4. In: Acta Crystallographica. 19, p. 269, doi : 10.1107 / S0365110X65003201 .
↑ Richard J. Lewis, Sr .: Hazardous Chemicals Desk Reference . John Wiley & Sons, 2008, ISBN 0-470-33445-2 , pp. 379 ( limited preview in Google Book search).
^ GW SMITH: Crystal Structure of Orthorhombic Cobalt Molybdate. In: Nature. 188, 1960, p. 306, doi : 10.1038 / 188306b0 .
↑ iarc.fr: cobalt and cobalt compounds , accessed on July 10, 2016
↑ V. Umapathy, P. Neeraja: Sol-Gel Synthesis and Characterizations of CoMoO ₄ Nanoparticles: An Efficient Photocatalytic Degradation of 4-chlorophenol. In: Journal of Nanoscience and Nanotechnology. 16, 2016, p. 2960, doi : 10.1166 / jnn.2016.10761 .
↑ ^a ^b E.R. Braithwaite, J. Haber: Molybdenum An Outline of its Chemistry and Uses . Elsevier, 2013, ISBN 978-1-4832-9089-8 , pp. 527 ( limited preview in Google Book search).
↑ Carine Livage, Amélie Hynaux, Jérôme Marrot, Marc Nogues, Gérard Férey: Solution process for the synthesis of the “high-pressure” phase CoMoO4 and X-ray single crystal resolution. In: Journal of Materials Chemistry. 12, p. 1423, doi : 10.1039 / B110760G .
↑ Kazuo Eda, Yuichi Uno, Noriko Nagai, Noriyuki Sotani, M. Stanley Whittingham: Crystal structure of cobalt molybdate hydrate CoMoO4-nH2O. In: Journal of Solid State Chemistry. 178, 2005, p. 2791, doi : 10.1016 / j.jssc.2005.06.014 .

[Alfa-1] ↑ ^a ^b ^c ^d ^e ^f ^g data sheet Cobalt (II) molybdenum oxide, 99.9% (metals basis), Ni 0.5% max from AlfaAesar, accessed on July 10, 2016 ( PDF )(JavaScript required) .

[DOI10.1107/S0365110X65003201-2] A ^b G. W. Smith, JA Ibers: The crystal structure of cobalt molybdate CoMoO4. In: Acta Crystallographica. 19, p. 269, doi : 10.1107 / S0365110X65003201 .

[Richard_J._Lewis,_Sr.-3] Richard J. Lewis, Sr .: Hazardous Chemicals Desk Reference . John Wiley & Sons, 2008, ISBN 0-470-33445-2 , pp. 379 ( limited preview in Google Book search).

[DOI10.1038/188306b0-4] GW SMITH: Crystal Structure of Orthorhombic Cobalt Molybdate. In: Nature. 188, 1960, p. 306, doi : 10.1038 / 188306b0 .

[iarc.fr-5] rc.fr: cobalt and cobalt compounds , accessed on July 10, 2016

[DOI10.1166/jnn.2016.10761-6] V. Umapathy, P. Neeraja: Sol-Gel Synthesis and Characterizations of CoMoO ₄ Nanoparticles: An Efficient Photocatalytic Degradation of 4-chlorophenol. In: Journal of Nanoscience and Nanotechnology. 16, 2016, p. 2960, doi : 10.1166 / jnn.2016.10761 .

[E.R._Braithwaite,_J._Haber-7] E.R. Braithwaite, J. Haber: Molybdenum An Outline of its Chemistry and Uses . Elsevier, 2013, ISBN 978-1-4832-9089-8 , pp. 527 ( limited preview in Google Book search).

[DOI10.1039/B110760G-8] Carine Livage, Amélie Hynaux, Jérôme Marrot, Marc Nogues, Gérard Férey: Solution process for the synthesis of the “high-pressure” phase CoMoO4 and X-ray single crystal resolution. In: Journal of Materials Chemistry. 12, p. 1423, doi : 10.1039 / B110760G .

[DOI10.1016/j.jssc.2005.06.014-9] Kazuo Eda, Yuichi Uno, Noriko Nagai, Noriyuki Sotani, M. Stanley Whittingham: Crystal structure of cobalt molybdate hydrate CoMoO4-nH2O. In: Journal of Solid State Chemistry. 178, 2005, p. 2791, doi : 10.1016 / j.jssc.2005.06.014 .