UQG Optics

SILICON (Si)
MATERIAL: Silicon – Optical Grade - Monocrystalline
SPECTRAL DATA: Transmission Standard Optical Grade
≥ 52% @ 3-5 microns
1mm thick
CHEMICAL & PHYSICAL PROPERTIES
Appearance / odor Steel grey crystal or powder no odor
Boiling point 2355 C / 4271F
Vapor pressure Not applicable
Solubility in water Insoluble
Specific gravity 2.33
Melting point 1410 C / 2570 F
PROPERTIES OF SILICON
Symbol Si
Atomic No 14
Atomic weight 28.086
Atomic density at 20°C, cm-3 5.00 x 10²²
Atomic volume at 20°C, cm3/g-atom 12.057
Lattice parameter at 23°C, A 5.43089 ± 0.00016
Crystal structure Diamond cubic
Density at 25°C, g/cm3 2.329
Hardness, mohs scale 7
Melting point °C 1412
Boiling point °C 2878
Heat of sublimation at m.p kcal/g 4.075
Heat of vaporization at m.p, kcal/g 3.812
Vapor pressure at m.p, mmHg 2.8 x 10-3
Heat of fusion at m.p, cal/g 264
Solid heat capacity at 25°C, cal/(mole
  • K)
4.78
Liquid heat capacity at m.p, cal/(mole
  • K)
6.755
Liquid density at m.p, gm/cm3 2.533
Surface tension at m.p, dynes/cm 736
Liquid viscosity at m.p, centipoises 0.88
Linear thermal expansion coefficient at 25°C,K-1 2.55 x 10-6
dN/dT 1.50 x 10-4 K-1
WHILE EVERY ATTEMPT HAS BEEN MADE TO VERIFY THE SOURCE OF THE INFORMATION, NO RESPONSIBILITY IS ACCEPTED FOR ACCURACY OF DATA.