Density

2.2x103 kg/m3

Dielectric Properties

(20°C and 1 MHz)

Hardness

5.5 - 6.5 Mohs' Scale 570 KHN 100

Constant

3.75

Design Tensile Strength

4.8x107 Pa (N/m2) (7000 psi)

Strength

5x107 V/m

Design Compressive Strength

Greater than 1.1 x l09 Pa (160,000 psi)

Loss Factor

Less than 4x10-4

Bulk Modulus

3.7x1010 Pa (5.3x106 psi)

Dissipation Factor

Less than 1x10-4

Rigidity Modulus

3.1x1010 Pa (4.5x106 psi)

Index of Refraction

1.4585

Young's Modulus

72GPa (10.5x106 psi)

Constringence (Nu)

67.56

Poisson's Ratio

0.17

Velocity of Sound-Shear Wave

3.75x103 m/s

Coefficient of Thermal Expansion

5.5x10 -7 cm/cm·°C (20°C-320°C)

Velocity of Sound/Compression Wave

5.90X103 m/s

Thermal Conductivity

1.4 W/m·°C

Sonic Attenuation

Less than 11 db/m MHz

Specific Heat

670 J/kg·°C

Permeability Constants(700°C)

(cm3 mm/cm2 sec cm of Hg)

Softening Point

1683°C

Helium

210x10-10

Annealing Point

1215°C

Hydrogen

21x10-10

Strain Point

1120 °C

Deuterium

17x10-10

Electrical Resistivity

7x107 ohm cm (350°C)

Neon

9.5x10-10