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High-silica Glass vs. Calcium Fluoride

High-silica glass belongs to the glass and glass-ceramics classification, while calcium fluoride belongs to the non-glass optical ceramics. There are 5 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is high-silica glass and the bottom bar is calcium fluoride.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.4
3.2
Elastic (Young's, Tensile) Modulus, GPa 78
80
Stiffness to Weight: Axial, points 19
14
Stiffness to Weight: Bending, points 61
45
Thermal Expansion, µm/m-K 0.6 to 0.75
19