Naming and classification
Physical properties
Reactions
Thermodynamic properties
Crystal structure
Atom properties
Electrochemical properties
Biological properties
Occurrence, isolation & synthesis
Isotopes
Safety
Uses
History
References
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].
Odor:
Odourless [4]
Molecular weight (g/mol):
78.96 [1]
Melting point (°C):
217 [1]
Boiling point (°C):
685 [1]
Critical temperature (°C):
1493 [3]
Density (g/cm3 ):
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].
Solubility:
Water: Insoluble (20 °C) [4]