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Yttrium orthovanadate

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Yttrium orthovanadate (YVO4) is a transparent crystal. Undoped YVO4 is also used to make efficient high-power polarizing prisms similar to Glan–Taylor prisms.

There are two principal applications for doped Yttrium orthovanadate:

  • Doped with neodymium it forms Nd:YVO4, an active laser medium used in diode-pumped solid-state lasers.
  • Doped with europium it forms Eu:YVO4, the dominant red phosphor used in cathode ray tubes especially in color TVs.

    • Basic properties

  • Crystal structure:
  • Zircon tetragonal (tetragonal bipyramidal)
  • Space group D4h
  • Lattice parameters a = b = 7.119 Å, c = 6.290 Å
  • Density: 4.24 g/cm3
  • Melting point: 1810–1940 °C
  • Mohs hardness: glass-like, ~5
  • Knoop hardness: 480 kg/mm2
  • Thermal expansion coefficient:
  • αa = 4.43×10−6/K
  • αc = 11.37×10−6/K
  • Thermal conductivity coefficient:
  • parallel to c-axis: 5.23 W·m−1·K−1
  • perpendicular to c-axis: 5.10 W·m−1·K−1
  • Refractive indices, birefringence ( Δn = ne - no) and walk-off angle at 45° (ρ):
  • at 0.63 µm:
  • ne = 2.2154
  • no = 1.9929
  • Δn = 0.2225
  • ρ = 6.04
  • at 1.30 µm:
  • ne = 2.1554
  • no = 1.9500
  • Δn = 0.2054
  • ρ= 5.72
  • at 1.55 µm:
  • ne = 2.1486
  • no = 1.9447
  • Δn = 0.2039
  • ρ = 5.69
  • Sellmeier equation (λ in µm):
  • ne2=4.59905 + 0.110534/(λ2 − 0.04813) − 0.012267612 λ2
  • no2=3.77834 + 0.069736/(λ2 − 0.04724) − 0.0108133 λ2

    • References

    Yttrium orthovanadate Wikipedia
    (Text) CC BY-SA


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