Mode

Direction of propagation

Direction of

polarization

Measured mode velocity (m/s)

Velocity-Elastic constant relation

Elastic constants

(GPa)

L

[100]

[100]

T

[100]

[001]

T

[100]

[001 & 010]

L

[001]

[001]

T

[001]

[001]

QL

Along mirror

Plane to

-axis

QL