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Physical Properties of Fullerenes

Properties of Carbon 60:

 
Average C-C distance 1.44 Å
FCC Lattice constant 14.17 Å
C60 mean ball diameter 6.83 Å
C60 ball outer diameter 10.18 Å
C60 ball inner diameter 3.48 Å
Tetrahedral site radius 1.12 Å
Octahedral site radius 2.07 Å
Mass density 1.72 g/cm3
Molecular density 1.44 x 1021/cm3
Compressibility (-d in V/dP) 6.9 x 10-12/cm3/dye
Bulk modulus 14 Gpa
Structural phase transitions 255K, 90K
Binding energy per atom 7.4 eV
Electron affinity (pristine C60) 2.65 eV
Ionization potential (1st) 7.58 eV
Ionization potential (2nd) 11.5eV
Vol. Coeff. Of thermal expansion  6.2 x 10-5 cm3/K
Band gap (HOMO-LUMO)  1.7 eV
Spin- orbit splitting C (2p) 0.0022 eV
Velocity of sound vt 2.1 x 105 cm/sec
Velocity of sound vl 3.6 x 105 cm/sec
Debye temperature 185 K
Thermal conductivity (300 K) 0.4W/mK
Phonon mean free path 50 Å
Static dielectric constant  4.0 – 4.5
Standard heat of formatio 9.08 k cal mol-1
Index of refraction 2.2 (600nm)
Boiling point Sublimes at 800K
Resistively 1014 ohms m-1
Vapor density N/A
Vapor pressure 5 x 10-6 torr at room temperature
Crystal form Hexagonal cubic
8 x 10-4 torr at 800K


Fullerene Extract mixture (C60/C70) solubility:

Solvents that dissolve fullerenes are listed below in order of high solubility.
( )=approx. saturated concentration.

1. 1,2,4-trichlorobenzene   (20mg/ml)
2. carbon disulfade   (12mg/ml)
3. toluene   (3.2mg/ml)
4. benzene   (1.8mg/ml)
5. chloroform   (0.5mg/ml)
6. carbon tetrachloride   (0.4mg/ml)
7. cyclohexane   (0.054mg/ml)
8. n-hexane   (0.046mg/ml)
9. THF   (0.037mg/ml)
10.acetonitrile   (0.02mg/ml)
11.methanol   (0.9µg/ml)


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