Bismuth trioxide battery technology

Bismuth trioxide (Bi2O3) is an inorganic compound with the molecular formula Bi2O3. Pure products have alpha and beta types. The alpha type is a yellow monoclinic crystal with a relative density of 8.9 and a melting point of 825 ℃. It is soluble in acid and insoluble in water and alkali; The beta type is bright yellow to orange, with a tetragonal crystal system, a relative density of 8.55, a melting point of 860 ℃, soluble in acid and insoluble in water.