Silver tungstate

Silver tungstate

Names
IUPAC name Disilver;dioxido(dioxo)tungsten
Identifiers
CAS Number	13465-93-5^Y
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:[1]
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]

2 AgNO₃ + Na₂WO₄ → Ag₂WO₄ + 2 NaNO₃

References

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