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Alpha Quartz vs. Magnesium Fluoride

Both alpha quartz and magnesium fluoride 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 alpha quartz and the bottom bar is magnesium fluoride.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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