Bismuth titanate or bismuth titanium oxide is a solid inorganic compound of bismuth, titanium and oxygen with the chemical formula of Bi12TiO20, Bi4Ti3O12 or Bi2Ti2O7
Melting point：875 °C (1,607 °F; 1,148 K) Decomposes to Bi4Ti3O12 and Bi2O3
Solubility in water：insoluble
Crystal structure：body-centered cubic
Bismuth titanates exhibit electrooptical effect and photorefractive effect, that is, a reversible change in the refractive index under applied electric field or illumination, respectively. Consequently, they have potential applications in reversible recording media for real-time holography or image processing applications.