Crystal symmetry: 32
Density: 8,1 g/cm^3
Optical spectral range: 0,6 - 16 mkm
Elastic constants 
: 10^11 dyn/cm^2 or 10^10 Pa)
| -- | -- | -- | -- | 0 | 0 |
| -- | -- | -- | -- | 0 | 0 |
| -- | -- | 4.86 | 0 | 0 | 0 |
| -- | -- | 0 | -- | 0 | 0 |
| 0 | 0 | 0 | 0 | -- | -- |
| 0 | 0 | 0 | 0 | -- | -- |
Photolastic constants 
:
| -- | 0.445 | -- | 0 | 0 | 0 |
| -- | 0.445 | -- | 0 | 0 | 0 |
| -- | 0.115 | 0 | 0 | 0 | 0 |
| -- | 0 | 0 | -- | 0 | 0 |
| 0 | 0 | 0 | 0 | -- | -- |
| 0 | 0 | 0 | 0 | -- | -- |
Refraction indices:
The values for refraction index for the given optical wavelengths.
| wavelength, mkm |  |  |
|---|
| 0.62 | 2,9028 | 3,256 |
|---|
| 0.6328 | 2,887 | 3,235 |
|---|
| 0.65 | 2,8655 | 3,2064 |
|---|
| 0.7 | 2,8224 | 3,1489 |
|---|
| 0.8 | 2,7704 | 3,0743 |
|---|
| 0.9 | 2,7383 | 3,034 |
|---|
| 1 | 2,712 | 3,005 |
|---|
| 1.2 | 2,6884 | 2,968 |
|---|
| 1.4 | 2,673 | 2,9475 |
|---|
| 1.6 | 2,6633 | 2,9344 |
|---|
| 1.8 | 2,6567 | 2,9258 |
|---|
| 2 | 2,6518 | 2,9194 |
|---|
| 2.4 | 2,6455 | 2,9108 |
|---|
| 2.8 | 2,6401 | 2,9036 |
|---|
| 3.2 | 2,6375 | 2,9001 |
|---|
| 3.6 | 2,6353 | 2,8971 |
|---|
| 5 | 2,6267 | 2,8863 |
|---|
| 6 | 2,6233 | 2,8799 |
|---|
| 7 | 2,6156 | 2,8741 |
|---|
| 8 | 2,6112 | 2,8674 |
|---|
| 9 | 2,6066 | 2,8608 |
|---|
| 10 | 2,6018 | 2,8522 |
|---|
| 11 | 2.5914 | 2.8433 |
|---|
Sound velocity:
| direction | polarization | v (10^5 cm/s) |
|---|
| [001] | [001] | 2.45 |
Cinnabar slowness surfaces in important planes
Acousto-optic figure of merit:
| sound dir. | sound pol. | light dir. | light pol. | M (10^-18 s^3/g) |
|---|
| [001] | [001] | -- | [100] | 450 |
