Thallium Bromoiodide (KRS-5) Optical Material

Thallium bromoiodide is a non-glass optical ceramic material.

Material Properties

Density7.4 g/cm3 (460 lb/ft3)

Elastic (Young's, Tensile) Modulus31 GPa (4.5 x 106 psi)

Light Transmission Range0.6 to 40 µm

Melting Onset (Solidus)420 °C (790 °F)

Poisson's Ratio0.37

Refractive Index2.4

Shear Modulus12 GPa (1.7 x 106 psi)

Specific Heat Capacity150 J/kg-K

Thermal Conductivity0.55 W/m-K

Thermal Diffusivity0.5 m2/s

Thermal Expansion6.0 µm/m-K

The length of each bar compares the given value to the highest value in the database.

Further Reading

Handbook of Optical Constants of Solids, Edward D. Palik (editor), 1998

Handbook of Optical Materials, Marvin J. Weber, 2003