Material properties

Below you’ll find some physical properties of Paratellurite (Tellurium Dioxide) single crystals – TeO2

Colorless synthetic single crystal, grown from melt with Czochralski method

Symmetry: Tetragonal, 422 (D4)

Lattice distances: a = 4.8122 A; c = 7.6157 A

Molecular weight: 159.5

Density, g/cm3: 5.99 ± 0.03

Melting point: 733 0С

Hardness: 3 – 4 Moh’s hardness scale

Thermal expansion, ·10-6 К-1: α11 = 17.7; α22 = 17.7; α33 = 5.5

Transmission: 0.35 – 5.0 μm

Refractive indexes:
λ, μm no ne Δn = ne – no
0.4047 2.4315 2.6167 0.1852
0.4358 2.3834 2.5583 0.1749
0.4678 2.3478 2.5164 0.1686
0.4800 2.3366 2.5036 0.1670
0.5086 2.3150 2.4779 0.1629
0.5461 2.2931 2.4520 0.1589
0.5893 2.2738 2.4295 0.1557
0.6328 2.2597 2.4119 0.1522
0.6438 2.2562 2.4086 0.1524
0.690 2.2450 2.3955 0.1505
0.800 2.226 2.373 0.147
1.00 2.208 2.352 0.144
Optical activity, along [001]:
λ, μm p, deg/mm λ, μm p, deg/mm
0.3698 587.1 0.5893 104.9
0.3783 520.6 0.6328 86.9
0.3917 437.4 0.700 67.4
0.4152 337.6 0.800 48.5
0.4382 271.0 0.900 37.4
0.4630 221.1 1.00 29.5
0.4995 171.2 1.10 23.8
0.5300 143.4

Dielectric permittivity: ε11 = 22.9; ε33 = 24.7

Elastic constants, ·10-10 N/m2: c11=5.57; c33=10.58; c44=2.65; c66=6.59; c12=5.12; c13=2.18

Photoelasticity coefficients: λ = 0.6328 μm

p11=0.0074; p12=0.187; p13=0.340; p31=0.0905; p33= 0.240; p44= – 0.17; p66= – 0.0463

Acoustooptical properties: λ = 0.6328 μm

Nsound Usound Vsound, ·103 м/с Nlight Elight M1, ·10-7 см2 · с/г M2, ·10-18 с3
[100] [100] 2.98 [010] [100] 0.097 0.048
[100] [100] - [010] [001] 22.9 10.6
[001] [001] 4.26 [010] [100] 142 34.5
[001] [001] - [010] [001] 113 25.6
[100] [010] 3.04 [001] optional 3.70 1.76
[110] [110] 4.21 [-110] [110] 323 0.802
[110] [110] - [-110] [001] 16.2 3.77
[101] [101] 3.64 [-101] [010] 101 33.4
[010] [010] 2.98 [-101] [101] 42.6 20.4
[110] [-110] 0.617 [001] optional 68.6 793
[101] [-101] 2.08 [010] [100] 76.4 77