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Chemical Formula

Si

Molecular Weight

28.09

Crystal Class

Cubic

Lattice Constant, ?

5.43

Density, g/cm³ at 293 K

2.329

Dielectric Constant for 9.37 x 10⁹ Hz

13

Melting Point, K

1690

Thermal Conductivity, W/(m K)
at 125 K
at 313 K
at 400 K

598.6
163
105.1

Thermal Expansion, 1/K
at 75 K
at 293 K
at 1400 K

-0.5 x 10^-6
2.6 x 10^-6
4.6 x 10^-6

Specific Heat, cal/(g K)
at 298 K
at 1800 K

0.18
0.253

Debye Temperature, K

640

Solubility in water

None

Knoop Hardness, kg/mm²

1100

Mohs Hardness

7

Young's Modulus, GPa

130.91

Shear Modulus, GPa

79.92

Bulk Modulus, GPa

101.97

Poisson's Ratio

0.28