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
- at 0.63 µm:
Read more about this topic: Yttrium Orthovanadate
Famous quotes containing the words basic and/or properties:
“The basic essential of a great actor is that he loves himself in acting.”
—Charlie Chaplin (1889–1977)
“The reason why men enter into society, is the preservation of their property; and the end why they choose and authorize a legislative, is, that there may be laws made, and rules set, as guards and fences to the properties of all the members of the society: to limit the power, and moderate the dominion, of every part and member of the society.”
—John Locke (1632–1704)