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Physical Properties |
Symbol |
Si |
Atomic Number |
14 |
Atomic Weight |
28.086 |
Atomic Density at 20°C, atoms/cm^3 |
5.00 x 10^22 |
Atomic Volume at 20°C, cm^3/g-atom |
12.057 |
Lattice Parameter at 23°C, Å |
5.43089 ± 0.00016 |
Crystal Structure |
Diamond Cubic |
Density at 25°C, g/cm^3 |
2.329 |
Hardness, Mohs Scale |
7 |
Vapor Pressure at m.p., mm Hg |
2.8 X 10^-4 |
Liquid Density at m.p., gm/cm^3 |
2.533 |
Surface Tension at m.p., dynes/cm |
736 |
Liquid Viscosity at m.p., centipoise |
0.88 |
Modulus of Rupture, Mpa |
125 |
dn/dT |
1.5 x 10^-4 K^-1 |
| Thermal Properties | |
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 |
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 |
Thermal Conductivity @ 300K, W/(m•K) |
149 |
Coefficient of Linear Expansion @ 300K |
2.55 x 10^-6 K^-1 |
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External links
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