Silver tungstate

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]

Silver tungstate
Names
IUPAC name
Disilver;dioxido(dioxo)tungsten
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.357
EC Number
  • 236-708-3
  • InChI=1S/2Ag.4O.W/q2*+1;;;2*-1;
    Key: QEKREONBSFPWTQ-UHFFFAOYSA-N
  • [O-][W](=O)(=O)[O-].[Ag+].[Ag+]
Properties
Ag2WO4
Molar mass 463.57 g mol−1
Hazards
GHS labelling:[1]
GHS07: Exclamation mark
Warning
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

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]

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.


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