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To avoid confusion about dimensionality of quantities, I list the ones
important for piezoelectricity. One can easily verify the correctness
of the wave equations and the consistency of other relations.
All quantities are given in SI units.
Some useful relations to check out the consistency:
 C = A s
 Joule = V A s =N m

 in
 in
 dimensionless
 in
 in
 in
 in (piezoelectric stress constants times inverse electrical permittivity)
 =
 eps_{0} in
 in
 in
 in
 in
 in
For example, we can verify the dimensions of the system of equations 18, omitting thermal effects, by substituting from the list as follows:
 
(35) 
If the whole system is divided by then the eigenvalues have the
dimension , which is the propagation velocity.
APPENDIX D
The parameters I used to calculate the slowness surfaces are as follows:
Next: Quartz
Up: Karrenbach: coupled wave propagation
Previous: Solving for particle motions
Stanford Exploration Project
1/13/1998