Cerium(III) fluoride, with the chemical formula CeF3, is an inorganic compound composed of the rare-earth metal cerium and the halogen fluoride. It is part of a group of compounds known as cerium(III) salts, where cerium is in its +3 oxidation state.

Properties of Cerium(III) Fluoride:

• Appearance: Cerium(III) fluoride is a white crystalline solid.
• Solubility: It is sparingly soluble in water.
• Crystal Structure: Cerium(III) fluoride has a cubic crystal structure.

Uses and Applications: Cerium(III) fluoride has various applications in different fields. Some of its uses include:

1. Phosphor: Cerium(III) fluoride is used as a phosphor in certain applications. Phosphors are materials that can absorb energy (such as ultraviolet light) and then emit light of a longer wavelength (visible light). Cerium-doped fluoride materials are known for their luminescent properties.
2. Scintillator: Similar to its use as a phosphor, cerium(III) fluoride can be used as a scintillator in certain radiation detectors and related technologies. Scintillators emit flashes of light when they interact with ionizing radiation, allowing for the detection and measurement of radiation.
3. Optical Coatings: Cerium(III) fluoride has applications in optical coatings due to its optical properties. It can be used to modify the light transmission and reflection characteristics of optical devices and coatings.
4. Catalyst: As with other cerium compounds, cerium(III) fluoride can also serve as a catalyst in various chemical reactions.

Safety Considerations: As with all chemicals, cerium(III) fluoride should be handled with care, and safety precautions should be followed. It is essential to consult the Material Safety Data Sheet (MSDS) for specific safety information.