Calcium Fluoride ( CaF2 ), Fluorite or Fluorospar - Properties and Applications


Calcium Fluoride (CaF2), is also known as fluorite or fluorospar.

It is a naturally occurring mineral that is transparent to translucent with colour varying widely from intense purple, to blue green, to yellow, through to reddish oranges, pinks, whites and browns.

Key Properties

Property Value
Density (g/cm3) 3.18
Melting Point (°C) 1360
Young’s Modulus (GPa) 75.8
Dielectric Constant at 106 Hz 6.76
Co-Efficient of Thermal Expansion (x10-6 °C-1) 18.85
Thermal Conductivity (Wm-1°K-1) 9.71



Calcium Fluoride is used as a flux in the aluminium industry and a source of fluorine for hydrofluoric acid production. It also finds use in cryogenically cooled thermal imaging stages. It can also be used as a gemstone, but its value is not high as it lacks hardness.




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