Nickel molybdate

Structural formula
General
Surname	Nickel molybdate
other names	Molybdenum-nickel tetraoxide; Nickel molybdenum oxide; Nickel (II) molybdate;
Molecular formula	NiMoO 4
Brief description	green odorless solid
External identifiers / databases
EC number	238-034-5
ECHA InfoCard	100.034.561
PubChem	84241
Wikidata	Q18212000
properties
Molar mass	218.62 g mol −1
Physical state	firmly
density	3.37 g cm −3 (α-form); 4.9 (β-form);
Melting point	970 ° C
solubility	hardly soluble in water (4.6 g l −1 at 20 ° C)
safety instructions
H and P phrases	H: 317-350i-372
	P: 201-260-280-308 + 313-405-501
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Nickel molybdate is an inorganic chemical compound of molybdenum from the group of molybdates .

Extraction and presentation

Nickel molybdate can be obtained by reacting nickel (II) oxide with molybdenum (VI) oxide . It is also possible to display it by reacting an ammonium orthomolybdate solution with a nickel (II) chloride solution .

{\ displaystyle \ mathrm {NiO + MoO_ {3} \ \ longrightarrow {} \ NiMoO_ {4}}}

{\ displaystyle \ mathrm {NiCl_ {2} + (NH_ {4}) _ {2} MoO_ {4} \ \ longrightarrow {} \ NiMoO_ {4} \ downarrow \ + \ 2 \ NH_ {4} Cl}}

properties

Nickel molybdate is a green, odorless solid that is sparingly soluble in water. Three modifications of the compound are known, of which the α-form has a monoclinic crystal structure with the space group C 2 / m (space group no. 12) which corresponds to that of cobalt molybdate . The β-form that develops from 602 ° C also has a monoclinic crystal structure with the space group C2 / m which, however, corresponds to the Scheelite type . The γ-form arises at 6.5 GPa and 700 ° C and has a monoclinic crystal structure with the space group P 2 / c (space group no. 13) . Template: room group / 12 Template: room group / 13

use

Nickel molybdate is used as a catalyst in the petroleum industry for the oil fraction of naphtha , kerosene and diesel . It is also widely used as a chemical intermediate for catalytic purposes.

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h entry to molybdenum Nickeltetraoxid in the GESTIS database of IFA , retrieved on July 23, 2016(JavaScript required) .
^ ^A ^b ^c Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 291 ( limited preview in Google Book search).
^ Gertrud Kiel: Inorganic basic internship compact Qualitative and quantitative analysis . John Wiley & Sons, 2012, ISBN 3-527-66378-9 , pp. 99 ( limited preview in Google Book search).
↑ E. Yu Tonkov: High Pressure Phase Transformations Handbook 1 . CRC Press, 1992, ISBN 978-2-88124-758-3 , pp. 561 ( limited preview in Google Book search).
↑ Data sheet Nickel molybdenum oxide, 98% from AlfaAesar, accessed on July 9, 2016 ( PDF )(JavaScript required) .

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h entry to molybdenum Nickeltetraoxid in the GESTIS database of IFA , retrieved on July 23, 2016(JavaScript required) .

[Dale_L._Perry-2] A ^b ^c Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 291 ( limited preview in Google Book search).

[Gertrud_Kiel-3] Gertrud Kiel: Inorganic basic internship compact Qualitative and quantitative analysis . John Wiley & Sons, 2012, ISBN 3-527-66378-9 , pp. 99 ( limited preview in Google Book search).

[E._Yu_Tonkov-4] E. Yu Tonkov: High Pressure Phase Transformations Handbook 1 . CRC Press, 1992, ISBN 978-2-88124-758-3 , pp. 561 ( limited preview in Google Book search).

[Alfa-5] Data sheet Nickel molybdenum oxide, 98% from AlfaAesar, accessed on July 9, 2016 ( PDF )(JavaScript required) .