Piezoelectric moduli were calculated for ferroelectric textures in the stat
es with the greatest possible (in terms of symmetry) polarization and the z
ero polarization (obtained from the former by electrical depolarization). T
he calculations were performed for the textures of crystals of the classes
2, 3, 4, 6, mm2, 3m, 4mm, and 6mm. The experimental results for lead zircon
ate-titanate- and barium-titanate-based piezoelectric ceramic are reported.