Yttrium orthovanadate

Yttrium orthovanadate (YVO₄) is a transparent crystal. Undoped YVO₄ is used to make efficient high-power polarizing prisms similar to Glan–Taylor prisms.^[1] With a chemical structure very similar to wakefieldite ([La,Ce,Nd,Y]VO₄), it is also sometimes used as a synthetic gemstone since the former is prohibitively rare.

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.^[2]
Doped with europium it forms Eu:YVO₄, the dominant red phosphor used in cathode-ray tubes especially in color TVs.^[3]

Basic properties

Crystal structure:^[4]
- Zircon tetragonal (tetragonal bipyramidal)
- Space group D_4h
- Lattice parameters a = b = 7.119 Å, c = 6.290 Å ^[5]
Density: 4.24 g/cm³^[5]
Melting point: 1810–1940 °C ^[5]
Mohs hardness: glass-like, ~5
Knoop hardness: 480 kg/mm²^[6]
Thermal expansion coefficient:^[4]
- α_a = 4.43×10⁻⁶/K
- α_c = 11.37×10⁻⁶/K
Thermal conductivity coefficient:^[4]
- 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 = n_e - n_o) and walk-off angle at 45° (ρ):
- at 0.63 μm:
  - n_e = 2.2154
  - n_o = 1.9929
  - Δn = 0.2225
  - ρ = 6.04
- at 1.30 μm:
  - n_e = 2.1554
  - n_o = 1.9500
  - Δn = 0.2054
  - ρ= 5.72
- at 1.55 μm:
  - n_e = 2.1486
  - n_o = 1.9447
  - Δn = 0.2039
  - ρ = 5.69
- Sellmeier equation (λ in μm):
  - n_e²=4.59905 + 0.110534/(λ² − 0.04813) − 0.012267612 λ²
  - n_o²=3.77834 + 0.069736/(λ² − 0.04724) − 0.0108133 λ²

References

↑USpatent 3914018,Deshazer, Larry G.,"Yttrium orthovanadate optical polarizer",issued 1975-10-21, assigned to Union Carbide Corp.
↑Koechner, Walter (2006). "Nd:YVO₄". Solid-state laser engineering. Springer. p. 69. ISBN 978-0-387-29094-2.
↑Caro, Paul (1998-06-01). "Rare earths in luminescence". Rare earths. Editorial Complutense. pp. 323–325. ISBN 978-84-89784-33-8.
1 2 3"Yttrium Vanadate (YVO4) Crystal". Casix. Archived from the original on May 17, 2008. Retrieved 2008-09-12.
1 2 3DeShazer, L.G.; Rand, S.C.; Wechsler, B.A. (1987). Weber, Marvin J. (ed.). Handbook of Laser Science and Technology, Vol. V: Optical materials part 3. Boca Raton, Florida: CRC Press. p. 283. ISBN 0-8493-3505-1.
↑DeShazer, L.G.; Rand, S.C.; Wechsler, B.A. (1987). Weber, Marvin J. (ed.). Handbook of Laser Science and Technology, Vol. V: Optical materials part 3. Boca Raton, Florida: CRC Press. p. 329. ISBN 0-8493-3505-1.

[1] USpatent 3914018,Deshazer, Larry G.,"Yttrium orthovanadate optical polarizer",issued 1975-10-21, assigned to Union Carbide Corp.

[2] Koechner, Walter (2006). "Nd:YVO₄". Solid-state laser engineering. Springer. p. 69. ISBN 978-0-387-29094-2.

[3] Caro, Paul (1998-06-01). "Rare earths in luminescence". Rare earths. Editorial Complutense. pp. 323–325. ISBN 978-84-89784-33-8.

[Casix-4] 1 2 3"Yttrium Vanadate (YVO4) Crystal". Casix. Archived from the original on May 17, 2008. Retrieved 2008-09-12.

[HoLSv283-5] 1 2 3DeShazer, L.G.; Rand, S.C.; Wechsler, B.A. (1987). Weber, Marvin J. (ed.). Handbook of Laser Science and Technology, Vol. V: Optical materials part 3. Boca Raton, Florida: CRC Press. p. 283. ISBN 0-8493-3505-1.

[HoLSv329-6] DeShazer, L.G.; Rand, S.C.; Wechsler, B.A. (1987). Weber, Marvin J. (ed.). Handbook of Laser Science and Technology, Vol. V: Optical materials part 3. Boca Raton, Florida: CRC Press. p. 329. ISBN 0-8493-3505-1.

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Yttrium orthovanadate

Basic properties

See also

References

関連するトピック

Glan–Taylor prisms

wakefieldite

doped

neodymium