Selenium

Physical properties
Content created by REAL intelligence since 2016


Physical state @ 20°C: Solid [4]
Color: Vitreous amorphous form: dark red to bluish-black [5]
Red monoclinic α-form: dark red, transparent [5].
Red monoclinic β-form: dark red, transparent [5].
Grey/metallic hexagonal crystal: grey to black [5].
Luminescence: -
Luster: -
Transparancy: -
Streak: -
Odor: Odourless [4]

Molecular weight (g/mol): 78.971(8) [9]
Melting point (°C): List of melting points 217 [1]
Boiling point (°C): List of boiling points 685 [1]
Density (g/cm3): Density list Vitreous amorphous form: 4.285 [1,5]
Red monoclinic α-form: 4.389 [1], 4.46 [5].
Grey/metallic hexagonal crystal: 4.189 [1], 4.81 [5].
Relative vapor density (g/cm3): -
Molar volume (cm3): -
Vapor pressure: -
Critical temperature (°C): 1493 [3]
Critical pressure (kPa): -

Elastic properties:
Young's modulus (GPa):
Rigidity modulus (GPa):
Bulk modulus (GPa):
Poisson ratio:
-
-
-
-
Hardness:
Mineral hardness:
Brinell hardness (MN/m2):
Vicker hardness (MN/m2):
-
-
-

Reflectivity (%): -
Refractive index: -
Velocity of sound (m/s): -
Surface tension: -

Solubility: Water: Insoluble (20 °C) [4]

Decomposition temperature: n/a
Flammability: -
Flash point: -
Auto ignition temperature: -
Flammability or explosive limits (% v/v):
Upper:
Lower:

-
-