Nickel tungstate

Structural formula
General
Surname	Nickel tungstate
other names	Nickel tungsten oxide
Molecular formula	NiWO 4
Brief description	light brown odorless solid
External identifiers / databases
EC number	238-032-4
ECHA InfoCard	100.034.560
PubChem	84240
Wikidata	Q18211990
properties
Molar mass	306.53 g mol −1
Physical state	firmly
solubility	practically insoluble in water
safety instructions
H and P phrases	H: 317-350i-372
	P: 201-280-302 + 352-308 + 313
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Nickel tungstate is an inorganic chemical compound of nickel from the tungstate group .

Extraction and presentation

Nickel tungstate can be obtained by reacting nickel (II) oxide with tungsten (VI) oxide .

It can also be obtained by reacting ammonium metatungstate and nickel nitrate or by reacting sodium tungstate , nickel (II) chloride and sodium chloride .

Amorphous nickel tungstate can be obtained by reacting nickel nitrate with a sodium tungstate solution at room temperature.

{\ displaystyle \ mathrm {Ni (NO_ {3}) _ {2} + Na_ {2} WO_ {4} \ \ longrightarrow {} \ NiWO_ {4} \ downarrow +2 \ NaNO_ {3}}}

properties

Nickel tungstate is a light brown odorless solid that is practically insoluble in water. The amorphous form is green and the polycrystalline form is brown. It has a monoclinic crystal structure of the wolframite type with the space group P 2 / c (space group no. 13) . The connection is electrochromic and antiferromagnetic. Template: room group / 13

use

Nickel tungstate is used as a photocatalyst , in moisture sensors and dielectric resonators. It is also viewed as a promising cathode material for asymmetrical supercapacitors .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Entry on nickel tungsten tetraoxide in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .
↑ Falko P. Netzer, Alessandro Fortunelli: Oxide Materials at the Two-Dimensional Limit . Springer, 2016, ISBN 978-3-319-28332-6 , pp. 386 ( limited preview in Google Book Search).
↑ JM Quintana-Melgoza, J. Cruz-Reyes, M. Avalos-Borja: Synthesis and characterization of NiWO4 crystals. In: Materials Letters. 47, 2001, p. 314, doi : 10.1016 / S0167-577X (00) 00272-X .
↑ ^a ^b R. O. Keeling: The structure of NiWO ₄ . In: Acta Crystallographica. 10, p. 209, doi : 10.1107 / S0365110X57000651 .
↑ ^a ^b A. Kuzmin, J. Purans, R. Kalendarev: Local structure and vibrational dynamics in NiWO ₄ . In: Ferroelectrics. 258, 2001, p. 21, doi : 10.1080 / 00150190108008653 .
↑ Mark Ladd, Rex Palmer: Structure Determination by X-ray Crystallography Analysis by X-rays and Neutrons . Springer Science & Business Media, 2014, ISBN 978-1-4614-3954-7 , pp. 277 ( limited preview in Google Book search).
^ Roger J. Mortimer: Electrochromic Materials and Devices . John Wiley & Sons, 2015, ISBN 978-3-527-33610-4 , pp. 22 ( limited preview in Google Book search).
^ C. Wilkinson, Μ. J. Sprague: The magnetic structures of NiWO ₄ and CoWO ₄ . In: Journal of Crystallography - Crystalline Materials. 145, 1977, doi : 10.1524 / zkri.1977.145.16.96 .
↑ Alexei Kuzmin, Aleksandr Kalinko, Robert Evarestov: First-principles LCAO study of phonons in NiWO4. In: Open Physics. 9, 2011, doi : 10.2478 / s11534-010-0091-z .
↑ Data sheet Nickel tungsten oxide, 99.9% (metals basis excluding Co), Co <100ppm from AlfaAesar, accessed on June 9, 2016 ( PDF )(JavaScript required) .
↑ RA Evarestov: Quantum Chemistry of Solids LCAO Treatment of Crystals and Nanostructures . Springer Science & Business Media, 2013, ISBN 978-3-642-30356-2 , pp. 480 ( limited preview in Google Book Search).

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f Entry on nickel tungsten tetraoxide in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .

[Falko_P._Netzer,_Alessandro_Fortunelli-2] Falko P. Netzer, Alessandro Fortunelli: Oxide Materials at the Two-Dimensional Limit . Springer, 2016, ISBN 978-3-319-28332-6 , pp. 386 ( limited preview in Google Book Search).

[DOI10.1016/S0167-577X(00)00272-X-3] JM Quintana-Melgoza, J. Cruz-Reyes, M. Avalos-Borja: Synthesis and characterization of NiWO4 crystals. In: Materials Letters. 47, 2001, p. 314, doi : 10.1016 / S0167-577X (00) 00272-X .

[DOI10.1107/S0365110X57000651-4] R. O. Keeling: The structure of NiWO ₄ . In: Acta Crystallographica. 10, p. 209, doi : 10.1107 / S0365110X57000651 .

[DOI10.1080/00150190108008653-5] A. Kuzmin, J. Purans, R. Kalendarev: Local structure and vibrational dynamics in NiWO ₄ . In: Ferroelectrics. 258, 2001, p. 21, doi : 10.1080 / 00150190108008653 .

[Mark_Ladd,_Rex_Palmer-6] Mark Ladd, Rex Palmer: Structure Determination by X-ray Crystallography Analysis by X-rays and Neutrons . Springer Science & Business Media, 2014, ISBN 978-1-4614-3954-7 , pp. 277 ( limited preview in Google Book search).

[Roger_J._Mortimer-7] Roger J. Mortimer: Electrochromic Materials and Devices . John Wiley & Sons, 2015, ISBN 978-3-527-33610-4 , pp. 22 ( limited preview in Google Book search).

[DOI10.1524/zkri.1977.145.16.96-8] C. Wilkinson, Μ. J. Sprague: The magnetic structures of NiWO ₄ and CoWO ₄ . In: Journal of Crystallography - Crystalline Materials. 145, 1977, doi : 10.1524 / zkri.1977.145.16.96 .

[DOI10.2478/s11534-010-0091-z-9] Alexei Kuzmin, Aleksandr Kalinko, Robert Evarestov: First-principles LCAO study of phonons in NiWO4. In: Open Physics. 9, 2011, doi : 10.2478 / s11534-010-0091-z .

[Alfa-10] Data sheet Nickel tungsten oxide, 99.9% (metals basis excluding Co), Co <100ppm from AlfaAesar, accessed on June 9, 2016 ( PDF )(JavaScript required) .

[R.A._Evarestov-11] RA Evarestov: Quantum Chemistry of Solids LCAO Treatment of Crystals and Nanostructures . Springer Science & Business Media, 2013, ISBN 978-3-642-30356-2 , pp. 480 ( limited preview in Google Book Search).