Crystal symmetry: m3m
Density: 2,3283 g/cm^3
Optical spectral range: 1,05 - 11 mkm
Elastic constants 
: 10^11 dyn/cm^2 or 10^10 Pa)
| 16.54 | 6.39 | 6.39 | 0 | 0 | 0 |
| 5.56 | 16.54 | 7.49 | 0 | 0 | 0 |
| 6.39 | 6.39 | 16.54 | 0 | 0 | 0 |
| 0 | 0 | 0 | 7.95 | 0 | 0 |
| 0 | 0 | 0 | 0 | 7.95 | 0 |
| 0 | 0 | 0 | 0 | 0 | 7.95 |
Photolastic constants 
:
| 0.081 | 0.001 | 0.001 | 0 | 0 | 0 |
| 0.001 | 0.081 | 0.001 | 0 | 0 | 0 |
| 0.001 | 0.001 | 0.081 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0.075 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0.075 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0.075 |
Refraction indices:
The values for refraction coefficients for the given optical wavelengths.
| wavelength, mkm | refraction index |
|---|
| 1.357 | 3.4975 |
|---|
| 1.395 | 3.4929 |
|---|
| 1.529 | 3.4792 |
|---|
| 1.661 | 3.4696 |
|---|
| 1.813 | 3.4608 |
|---|
| 2.153 | 3.4476 |
|---|
| 2.325 | 3.443 |
|---|
| 2.437 | 3.4408 |
|---|
| 2.714 | 3.4358 |
|---|
| 3 | 3.432 |
|---|
| 3.5 | 3.4284 |
|---|
| 4 | 3.4255 |
|---|
| 4.5 | 3.4236 |
|---|
| 5 | 3.4223 |
|---|
| 5.5 | 3.4213 |
|---|
| 6 | 3.4202 |
|---|
| 7 | 3.4189 |
|---|
| 8 | 3.4189 |
|---|
| 10 | 3.4189 |
|---|
| 11 | 3.4189 |
|---|
Sound velocity:
| direction | polarization | v (10^5 cm/s) |
|---|
| [001] | L | 8.43 |
| [100] | [110], S | 5.84 |
| [110] | L | 9.13 |
| [110] | [001], S | 5.84 |
| [110] | [1-10], S | 4.67 |
| [1-10] | [001], S | 5.84 |
| [111] | L | 9.35 |
| [111] | arb., S | 9.35 |
Acousto-optic figure of merit:
| sound dir. | sound pol. | light dir. | light pol. | M (10^-18 s^3/g) |
|---|
| [111] | L | -- | [111] | 6.2 |
| [100] | [001] | -- | arb. | 24.1 |
| [111] | L | -- | [111] | 6.2 |
| [100] | [001] | -- | arb. | 24.1 |
