Physical properties: colorless transparent cubic crystal or white powder. Dissolved in hydrochloric acid, nitric acid, hydrofluoric acid and ammonium chloride solution, slightly soluble in water. The relative density of 4.83. Melting point 1353 ℃. Boiling point 2260 ℃. Refractive index (n25D) 1.471.
Uses: used in the manufacture motor brushes, optical glass, fiber optics, optical crystal lenses, laser generator, flux, enamel coating agents, but also for wood preservatives and pesticides. The system for flux, enamel manufacturing