Crystalline Structure

Cubic Single Crystal

Composition

M_gO*3.5AL₂O₃

Purity

99.99%

Cleavage

-

Density

3.61 g/cm³

Disclosation Density

10⁹-10⁸/m²

Melting Point

2300K-2330K

Softening Point

2070K

Specific Heat

7.9*10² J/Kg*K at 300K

Thermal Conductivity

-

Thermal Expansion

5.9*10^-6/K

Hardness

Mohs8,Knoop 1175-1380

Youngs Modulus

-

Modulus of Rupture

-

Compressive Strength

-

Tensile Strength

-

Poissons constant

-

Acids and alkalis attack

0 at Room temperature

Porosity

0

Dielectric Constant

8-9

Electrical Resistivity

-

Refractive Index n_D at 0.5893μm

1.727

Dispersive Power(n_F-n_C)

0.012

Transmission,Disc Thickness

5 mm

-Visible Light

-

-Infrared

85% 1μm

-Ultraviolet

-