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**Molecular formula:** CaF₂ **Molar mass:** 78.07 g/mol **Description:** Calcium fluoride is a colorless crystalline substance that is insoluble in water. It is an ionic compound consisting of a calcium cation (Ca²⁺) and a fluoride anion (F⁻). **Applications:** Calcium fluoride is a primary source of hydrogen fluoride, produced through the reaction: CaF₂ + H₂SO₄ → CaSO₄ + 2 HF. It is also widely used as a material for manufacturing lenses. **Occurrence:** Calcium fluoride naturally occurs as the mineral fluorite.
