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by | Dec 20, 2017 | Jays

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Barium tungstate is an inorganic chemical compound of barium and the tungstate anion.

Synthesis and properties

Barium tungstate can be obtained from the precipitation reaction between barium nitrate and ammonium paratungstate or sodium tungstate.[5][6]

Ba(NO3)2 + Na2WO4 → BaWO4↓ + 2 NaNO3

It is a white solid,[3] which at normal conditions forms tetragonal crystals similar to scheelite, CaWO4. Under pressures above 7 GPa, the compound undergoes transformation to a monoclinic structure similar to fergusonite, YNbO4.[7]

Uses

Barium tungstate can be used as a frequency shifter in laser technology.[8] It has uses in X-ray photography and as a pigment.[4]

References

  1. ^ Kawada, I.; Kato, K.; Fujita, T. (1974-08-01). "BaWO 4 -II (a high-pressure form)". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 30 (8): 2069–2071. Bibcode:1974AcCrB..30.2069K. doi:10.1107/S0567740874006431. ISSN 0567-7408.
  2. ^ Ge, W. W.; Zhang, H. J.; Wang, J. Y.; Liu, J. H.; Xu, X. G.; Hu, X. B.; Jiang, M. H.; Ran, D. G.; Sun, S. Q.; Xia, H. R.; Boughton, R. I. (2005). "Thermal and mechanical properties of BaWO4 crystal". Journal of Applied Physics. 98 (1): 013542. doi:10.1063/1.1957125. ISSN 0021-8979.
  3. ^ a b c "MSDS-343137". Sigma-Aldrich. Retrieved 2020-07-10.
  4. ^ a b Perry, Dale L. (2011). Handbook of Inorganic Compounds (2nd ed.). CRC Press. p. 59. ISBN 978-1-4398-1461-1.
  5. ^ Vidya, S.; Solomon, Sam; Thomas, J. K. (2013). "Synthesis, Characterization, and Low Temperature Sintering of Nanostructured BaWO4 for Optical and LTCC Applications". Advances in Condensed Matter Physics. 2013: 1–11. doi:10.1155/2013/409620. ISSN 1687-8108.
  6. ^ Mohamed Jaffer Sadiq, M.; Samson Nesaraj, A. (2015). "Soft chemical synthesis and characterization of BaWO4 nanoparticles for photocatalytic removal of Rhodamine B present in water sample". Journal of Nanostructure in Chemistry. 5 (1): 45–54. doi:10.1007/s40097-014-0133-y. ISSN 2008-9244.
  7. ^ Errandonea, D.; Pellicer-Porres, J.; Manjón, F. J.; Segura, A.; Ferrer-Roca, Ch.; Kumar, R. S.; Tschauner, O.; López-Solano, J.; Rodríguez-Hernández, P.; Radescu, S.; Mujica, A. (2006-06-05). "Determination of the high-pressure crystal structure of BaWO4 and PbWO4". Physical Review B. 73 (22): 224103. arXiv:cond-mat/0602632. Bibcode:2006PhRvB..73v4103E. doi:10.1103/PhysRevB.73.224103. ISSN 1098-0121. S2CID 55297808.
  8. ^ Colin E., Webb; Jones, Julian D. C. (2004). Handbook of Laser Technology and Applications: Laser Design and Laser Systems. CRC Press. p. 486. ISBN 978-0-7503-0963-9.
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