Strontium barium niobate

Strontium barium niobate is the chemical compound SrxBa1-xNb2O6 for 0.32≤x≤0.82.
Strontium Barium Niobate is a ferroelectric material commonly used in single crystal form in electro-optics, acousto-optics, and photorefractive non-linear optics for its photorefractive properties.