Lithium niobate physical properties

Crystal symmetry: 3m

Density: 4,628 g/cm^3

Optical spectral range: 0,4 - 5 mkm

Elastic constants : 10^11 dyn/cm^2 or 10^10 Pa)

20.18	5.56	7.49	0.83	0	0
5.56	20.18	7.49	-0.83	0	0
7.49	7.49	24.13	0	0	0
0.83	-0.83	0	5.95	0	0
0	0	0	0	5.95	0.83
0	0	0	0	0.83	7.28

Photolastic constants :

0.03	0.079	0.104	-0.071	0	0
0.079	0.03	0.104	0.071	0	0
0.172	0.172	0.078	0	0	0
-0.152	0.152	0	0.22	0	0
0	0	0	0	0.22	-0.152
0	0	0	0	-0.071	-0.025

Refraction indices:

The values for refraction coefficients for the given optical wavelengths.

wavelength, mkm
0.4047	2.4338	2.3207
0.4358	2.3957	2.2922
0.4678	2.3665	2.2690
0.48	2.3573	2.2615
0.5086	2.3391	2.2461
0.5461	2.3204	2.2299
0.5895	2.3038	2.2152
0.6328	2.2908	2.2037
0.6438	2.2879	2.2012
0.69	2.2773	2.1919
0.8	2.2588	2.1758
1	2.2399	2.1584
1.15	2.2303	2.1505
1.55	2.2150	2.1365
2	2.2020	2.1245
3	2.1694	2.0961
3.39	2.1567	2.0828
4	2.1409	2.0584

Sound velocity:

direction	polarization	v (10^5 cm/s)
[100]	[100], L	6.549
[010]	[010], L	6,838
[010]	S	4.4667
[001]	[001], L	7.331
[001]	[100], S	3.5885
[010]	[100], S	3.838
[001]	[001], L	7.271
[100]	[001], S	4.801
[100]	[010], S	4.0593
[010]	[010], QL	6.882
[010]	[100], S	3.962
[010]	[001], QS	4.494
[001]	[001], L	7.333
[001]	[001], L	7.22
[010]	[010], L	6.58
[100]	[100], L	6.57
[001]	[010], S	3.57
[001]	[100], S	3.57
[001]	[001], L	7.331

Lithium niobate 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]	--	[010]	6.4
[001]	[001]	--	[001]	4.6
[100]	[100]	--	[001]	27.4
[100]	[100]	--	[010]	5.6
[100]	[100]	--	[100]	1.4
[001]	[010]	--	[100]	29.2
[001]	[010]	--	[010]	29.2
[001]	[001]	--	[010]	6.4
[001]	[001]	--	[001]	4.6
[100]	[100]	--	[001]	27.4
[100]	[100]	--	[010]	5.6
[100]	[100]	--	[100]	1.4
[001]	[010]	--	[100]	29.2
[001]	[010]	--	[010]	29.2