Ammonium tetrathiotungstate is a chemical compound with the chemical formula (NH4)2WS4.[3][4]

Synthesis

Ammonium tetrathiotungstate can be obtained by the reaction of tungstic acid, ammonia, and hydrogen sulfide in a water bath at 65-70°C:[5]

H2WO4 + 2NH3·H2O + 4H2S → (NH4)2WS4 + 6H2O

Physical properties

Ammonium tetrathiotungstate forms yellow to orange crystals, soluble in water.[6][7]

The compound decomposes under heat to produce tungsten trisulfide at 170-280°C and tungsten disulfide at 260-500°C.[8]

Uses

The compound is used in materials science and catalysis.[7]

References

  1. ^ "Ammonium Tetrathiotungstate | Ammonium thiotungstate (VI) | H8N2S4W". Ereztech. Retrieved 27 February 2025.
  2. ^ "Ammonium tetrathiotungstate" (PDF). Carl Roth. Retrieved 27 February 2025.
  3. ^ Delmon, B.; Grange, P.; Froment, G. F. (3 November 1999). Hydrotreatment and Hydrocracking of Oil Fractions. Elsevier. p. 113. ISBN 978-0-08-053426-8. Retrieved 27 February 2025.
  4. ^ Wang, Haidou; Xu, Binshi; Liu, Jiajun (1 February 2013). Micro and Nano Sulfide Solid Lubrication. Springer Science & Business Media. p. 38. ISBN 978-3-642-23102-5. Retrieved 27 February 2025.
  5. ^ Perry, Dale L. (19 April 2016). Handbook of Inorganic Compounds. CRC Press. p. 35. ISBN 978-1-4398-1462-8. Retrieved 27 February 2025.
  6. ^ Haynes, William M. (9 June 2015). CRC Handbook of Chemistry and Physics, 96th Edition. CRC Press. p. 4-48. ISBN 978-1-4822-6097-7. Retrieved 27 February 2025.
  7. ^ a b "Ammonium tetrathiotungstate". Chem-Impex. Retrieved 27 February 2025.
  8. ^ Hunyadi, Dávid; Vieira Machado Ramos, Ana Luisa; Szilágyi, Imre Miklós (1 April 2016). "Erratum to: Thermal decomposition of ammonium tetrathiotungstate". Journal of Thermal Analysis and Calorimetry. 124 (1): 567. doi:10.1007/s10973-016-5353-6. ISSN 1588-2926. Retrieved 27 February 2025.
Allikas: http://en.wikipedia.org/wiki/Ammonium_tetrathiotungstate
No tags for this post.