Chemical Structure of Calcium Fluoride

Properties of Calcium Fluoride:

Molecularformula:CaF2
CAS No.:7789-75-5
Molecularweight: 78.07
Execute standard: National standard/GB
Apperance:White crystalline solid (single crystals are transparent)
Melting point:1418 °C, 1691 K, 2584 °F
Boiling point:2533 °C, 2806 K, 4591 °F

Preparation:
The mineral fluorspar is abundant, widespread, and mainly of interest as a precursor to HF. Thus, little motivation exists for the preparation of CaF2. High purity CaF2 is produced by treating calcium carbonate with hydrofluoric acid:
CaCO3 + 2 HF → CaF2 + CO2 + H2O
 Source of HF:
Naturally occurring CaF2 is the principal source of hydrogen fluoride, a commodity chemical used to produce a wide range of materials. Hydrogen fluoride is liberated from the mineral by the action of concentrated sulfuric acid:
CaF2(s) + H2SO4 → CaSO4(solid) + 2 HF(g)
The resulting HF is converted into fluorine, fluorocarbons, and diverse fluoride materials. As of the late 1990s, five billion kilograms were mined annually.

Read More:  Calcium fluoride suppliers