3. Physical properties: white powder, density 5.936. Melting point 1493 ℃, boiling point 2330 ℃, insoluble in water, insoluble in hydrochloric acid, nitric acid and sulfuric acid, but can be dissolved in perchloric acid. There are hygroscopic in the air, more stable.
4. Application: Lanthanum Fluoride, is mainly applied in specialty glass, water treatment and catalyst, and also as the main raw materials for making Lanthanum Metal.