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Magnesium Fluoride vs. Alpha Quartz

Both magnesium fluoride and alpha quartz are non-glass optical ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is magnesium fluoride and the bottom bar is alpha quartz.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 130
91
Poisson's Ratio 0.27
0.13
Shear Modulus, GPa 76
31

Thermal Properties

Melting Onset (Solidus), °C 1260
1590
Specific Heat Capacity, J/kg-K 980
720
Thermal Conductivity, W/m-K 28
8.5
Thermal Expansion, µm/m-K 11
9.5

Otherwise Unclassified Properties

Density, g/cm3 3.2
2.7
Light Transmission Range, µm 0.12 to 7.0
0.13 to 3.4
Refractive Index 1.4
1.6

Common Calculations

Stiffness to Weight: Axial, points 22
19
Stiffness to Weight: Bending, points 52
57
Thermal Diffusivity, mm2/s 8.8
4.4