Silver tungstate

Silver tungstate
Names
	IUPAC name Disilver;dioxido(dioxo)tungsten
Identifiers
CAS Number	13465-93-5 ;
3D model (JSmol)	Interactive image;
ChemSpider	10790108;
ECHA InfoCard	100.033.357
EC Number	236-708-3;
PubChem CID	22045798;
	InChI InChI=1S/2Ag.4O.W/q2+1;;;2-1; Key: QEKREONBSFPWTQ-UHFFFAOYSA-N;
	SMILES [O-][W](=O)(=O)[O-].[Ag+].[Ag+];
Properties
Chemical formula	Ag2WO4
Molar mass	463.57 g mol−1
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Silver tungstate is an inorganic tungstate with the chemical formula Ag₂WO₄. It has been applied in various fields such as photoluminescence, antibacterial action, ozone gas sensors and humidity sensors.^[2]^[3] It is also used in the electronic and chemical industries, and also used in proteomics research.^[4]

Phases

Silver tungstate occurs in three polymorphic phases: orthorhombic (α), hexagonal (β) and cubic (γ).^[2] α-silver tungstate is thermodynamically stable, while β- and γ-silver tungstate are metastable.^[5]

Synthesis

Silver tungstate is synthesised through the following reaction between silver nitrate and sodium tungstate, producing sodium nitrate as a byproduct:^[2]

{\ce {2AgNO3 + Na2WO4 -> Ag2WO4 + 2NaNO3}}

References

^ "C&L Inventory". echa.europa.eu.
^ ^a ^b ^c Sreedevi, A.; Priyanka, K. P.; Babitha, K. K.; Aloysius Sabu, N.; Anu, T. S.; Varghese, T. (2015-09-01). "Chemical synthesis, structural characterization and optical properties of nanophase α-Ag₂WO₄". Indian Journal of Physics. 89 (9): 889–897. Bibcode:2015InJPh..89..889S. doi:10.1007/s12648-015-0664-1. ISSN 0974-9845. S2CID 122042870.
^ De Santana, Yuri V. B.; Gomes, José Ernane Cardoso; Matos, Leandro; Cruvinel, Guilherme Henrique; Perrin, André; Perrin, Christiane; Andrès, Juan; Varela, José A.; Longo, Elson (2014-01-01). "Silver Molybdate and Silver Tungstate Nanocomposites with Enhanced Photoluminescence". Nanomaterials and Nanotechnology. 4: 22. doi:10.5772/58923. hdl:10234/121786. ISSN 1847-9804. S2CID 7415517.
^ "13465-93-5 - Silver tungsten oxide, 99% (metals basis) - Silver tungstate - 39661 - Alfa Aesar". www.alfa.com. Retrieved 2022-08-29.
^ Alvarez Roca, Roman; Lemos, Pablo S.; Gracia, Lourdes; Andrés, Juan; Longo, Elson (2016-10-03). "Uncovering the metastable γ-Ag₂WO₄ phase: a joint experimental and theoretical study". RSC Advances. 7 (10): 5610–5620. Bibcode:2017RSCAd...7.5610R. doi:10.1039/C6RA24692C. hdl:10234/167867.

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[1] "C&L Inventory". echa.europa.eu.

[Sreedevi-2] Sreedevi, A.; Priyanka, K. P.; Babitha, K. K.; Aloysius Sabu, N.; Anu, T. S.; Varghese, T. (2015-09-01). "Chemical synthesis, structural characterization and optical properties of nanophase α-Ag₂WO₄". Indian Journal of Physics. 89 (9): 889–897. Bibcode:2015InJPh..89..889S. doi:10.1007/s12648-015-0664-1. ISSN 0974-9845. S2CID 122042870.

[3] De Santana, Yuri V. B.; Gomes, José Ernane Cardoso; Matos, Leandro; Cruvinel, Guilherme Henrique; Perrin, André; Perrin, Christiane; Andrès, Juan; Varela, José A.; Longo, Elson (2014-01-01). "Silver Molybdate and Silver Tungstate Nanocomposites with Enhanced Photoluminescence". Nanomaterials and Nanotechnology. 4: 22. doi:10.5772/58923. hdl:10234/121786. ISSN 1847-9804. S2CID 7415517.

[4] "13465-93-5 - Silver tungsten oxide, 99% (metals basis) - Silver tungstate - 39661 - Alfa Aesar". www.alfa.com. Retrieved 2022-08-29.

[5] Alvarez Roca, Roman; Lemos, Pablo S.; Gracia, Lourdes; Andrés, Juan; Longo, Elson (2016-10-03). "Uncovering the metastable γ-Ag₂WO₄ phase: a joint experimental and theoretical study". RSC Advances. 7 (10): 5610–5620. Bibcode:2017RSCAd...7.5610R. doi:10.1039/C6RA24692C. hdl:10234/167867.

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