Solid phase
Official name
solid Benzene
Type
Family
molecular solid
Class
non polar molecular solid
Compound type
organic molecular solid
Chemical composition
Formula
$C_6H_6$
Chemical formula
C6H6
Elemental formula
C6 H6
Isotope mixture type
terrestrial abundance
2.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$C_6H_6$ Benzene molecule 1 1.0 1.0 pure main
Chemical functions
  Function Number
$R=CH-R$ 6
Chemical bonds
  Bond Number
$\eqslantgtr C-H$ 6
$\eqslantgtr C-C\eqslantless$ 3
$>C=C<$ 3
Class
molecular solids with apolar molecules (01)
Type
with polyatomic organic apolar molecules (CnHm...) (01.06)
Equivalent liquid
liquid Benzene
Phase name
solid Benzene
Phase type
crystalline
Crystal system
orthorhombic
Crystal class
dipyramidal
Crystal class symbol
mmm (D2h)
Crystal spacegroup
Pbca
Comments
only crystal structure known for solid C6H6 at low pressure, amorphous below 30-60 K
Molar mass
78.1118 $g/mol$
State NTP
liquid
Phase transitions
Phase transition type Other phases Temperature - Pressure
triple point solid-liquid-gas liquid Benzene and gas 278.68 +/- 0.02 K (47.85 +/- 0.05 mbar)
Refringence type
biaxial
Refraction index $n_{\alpha}$
1.544 (100 K), 1.66 (th.)
Refraction index $n_{\beta}$
1.646
Refraction index $n_{\gamma}$
1.550
Pure color
colorless
Color
colorless
Diaphaneity
transparent
Luster
vitreous
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