Nonlinear optical, piezoelectric, and acoustic properties of SrB4O7

We have measured the second-order nonlinear optical susceptibilities of an SrB4O7 crystal and have determined its electromechanical coupling coefficients, piezoelectric charge and voltage constants, and bulk acoustic wave velocities by a resonance method using high-Q resonators. In addition, the dielectric permittivity of the crystal has been measured at 1 kHz.