Elastic constants cij
(1011 dyn/cm2 or 1010 Pa):
| 1.09 |
0.665 |
0.522 |
0 |
0 |
0.145 |
| 0.665 |
1.09 |
0.522 |
0 |
0 |
-0.145 |
| 0.522 |
0.522 |
0.93 |
0 |
0 |
0 |
| 0 |
0 |
0 |
0.266 |
0 |
0 |
| 0 |
0 |
0 |
0 |
0.266 |
0 |
| 0.145 |
-0.145 |
0 |
0 |
0 |
0.343 |
Photoelastic constants pij:
| 0.26 |
0.26 |
0.28 |
0 |
0 |
0.014 |
| 0.26 |
0.26 |
0.28 |
0 |
0 |
-0.014 |
| 0.16 |
0.16 |
0.296 |
0 |
0 |
0 |
| 0 |
0 |
0 |
0.067 |
0.01 |
0 |
| 0 |
0 |
0 |
-0.01 |
0.067 |
0 |
| 0.03 |
-0.03 |
0 |
0 |
0 |
0.045 |
Sound velocity:
| direction |
polarization |
v (105
cm/s) |
| [100] |
[100], L |
3.98 |
| [110] |
[010], S |
2.2 |
| [100] |
[001], S |
1.99 |
| [001] |
[001], L |
3.75 |
| [001] |
[001], L |
3.632 |
| [100] |
[001], S |
1.961 |
Acousto-optic figure of merit:
| sound dir. |
sound pol. |
light dir. |
light pol. |
M (10-18
s3/g) |
| [100] |
[100] |
[010] |
[001] |
5 |
| [100] |
[100] |
[010] |
[100] |
16 |
| [100] |
[100] |
[001] |
[010] |
16 |
| [100] |
[010] |
[001] |
[010] |
8.5 |
| [001] |
[010] |
[001] |
[100] |
23.7 |
| [001] |
[001] |
[010] |
[001] |
23.7 |
|
Refraction
indices:
| l (mkm) |
nx |
ny |
nz |
| 0.4046 |
2.7191 |
2.7191 |
2.4429 |
| 0.48 |
2.5136 |
2.5136 |
2.3409 |
| 0.5086 |
2.4754 |
2.4754 |
2.3185 |
| 0.546 |
2.4388 |
2.4388 |
2.2959 |
| 0.577 |
2.416 |
2.416 |
2.2814 |
| 0.6438 |
2.3808 |
2.3808 |
2.2581 |
| 1.014 |
2.3072 |
2.3072 |
2.2066 |
| 1.5 |
2.2808 |
2.2808 |
2.1817 |
| 2 |
2.2679 |
2.2679 |
2.1769 |
| 2.5 |
2.2577 |
2.2577 |
2.1686 |
| 3 |
2.2474 |
2.2474 |
2.1603 |
| 3.25 |
2.2418 |
2.2418 |
2.1556 |
| 3.5 |
2.236 |
2.236 |
2.1507 |
| 3.75 |
2.2297 |
2.2297 |
2.1455 |
NOTE: It should be taken into account that
nx=ny=nz=n
for optically isotropic material and nx=ny=no
and nz=ne
for uniaxial crystal. |
Crystal symmetry:
4/m
Density: 6.95 g/cm3
Optical spectral range: 0.4 - 5.5 mkm |
