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Barium tungstate

7.26 g·cm−3 (high pressure form)

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.

:Ba(NO3)2 + Na2WO4 → BaWO4↓ + 2 NaNO3

It is a white solid, 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.

Uses

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

References

References

  1. (1974-08-01). "BaWO 4 -II (a high-pressure form)". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry.
  2. (2005). "Thermal and mechanical properties of BaWO4 crystal". Journal of Applied Physics.
  3. (2013). "Synthesis, Characterization, and Low Temperature Sintering of Nanostructured BaWO4 for Optical and LTCC Applications". Advances in Condensed Matter Physics.
  4. (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. "MSDS-343137". Sigma-Aldrich.
  6. (2006-06-05). "Determination of the high-pressure crystal structure of BaWO4 and PbWO4". Physical Review B.
  7. (2004). "Handbook of Laser Technology and Applications: Laser Design and Laser Systems.". CRC Press.
  8. Perry, Dale L.. (2011). "Handbook of Inorganic Compounds". CRC Press.
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