Transmission Range, µm for 72 %

8 - 11

Transmission Range Multispectral Grade, µm for 72 %

0.8 - 11.0

Refractive Index, at 0.4678 µm

2.44915

Refractive Index, at 10 µm

2.20084

Reflection Loss, % for two surfaces at 10.6 µm

24

dN/dT, 1/°C at at 3.39 µm

38.7 x 10-⁶

dN/dT, 1/°C at at 0.6328 µm

54.3 x 10-⁶

Grain Size FLIR Grade, µm

2 - 8

Grain Size Multispectral, µm

20 -200

Density, g/cm³ at 25 °C

4.09

Solublity, g/100 g H₂O

65 x 10^-6

Type of Material

polycrystalline,
synthetic,
graininess < 200 µm

Crystal Structure

cubic, CsCl type structure

Melting Point, at °C

1020

Thermal Conductivity, W/(m · K) at 20 °C

16.8
27.2

Thermal Expansion, 1/°C

6.5 x 10-6

Mohs Hardness, indenter load 50g

160

Specific Heat, J/(kg · K) at 20 - 100 °C

0.47
0.53

Specific Heat Capacity FLIR; Multisp., J/(g · K)

515

Dielectric Constant, at f = 2 MHz

8.5

Young´s Modulus (E), GPa

74.46

Elastic Coefficients

C₁₁ = 102
C₁₂ = 65
C₄₄ = 45

Apparent Elastic Limit, MPa

59

Poisson´s Ratio

0.28

Spec. Resistivity (undoped), Ohm.cm

10⁸ - 10¹²

Lattice Constant, Å at 27 °C

a = 3.82
c = 6.26

Rupture Modulus, MPa

60

Knoop Hardness FLIR Grade, kg/mm²

210 - 240

Knoop Hardness Multispectral Grade, kg/mm²

150 - 165