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Thallium Bromoiodide vs. Lithium Fluoride

Both thallium bromoiodide and lithium 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. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is thallium bromoiodide and the bottom bar is lithium fluoride.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 31
120
Poisson's Ratio 0.37
0.27
Shear Modulus, GPa 12
52

Thermal Properties

Melting Onset (Solidus), °C 420
870
Specific Heat Capacity, J/kg-K 150
1560
Thermal Conductivity, W/m-K 0.55
12
Thermal Expansion, µm/m-K 6.0
32

Otherwise Unclassified Properties

Density, g/cm3 7.4
2.6
Light Transmission Range, µm 0.6 to 40
0.12 to 6.5
Refractive Index 2.4
1.4

Common Calculations

Stiffness to Weight: Axial, points 2.3
24
Stiffness to Weight: Bending, points 14
62
Thermal Diffusivity, mm2/s 0.5
2.9