Vapor pressure of Buckminsterfullerene

Journal Article · Mon Mar 16 04:00:00 EST 1992 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.107327· OSTI ID:7070419

Abrefah, J; Olander, D R ^[1]; Balooch, M; Siekhaus, W J ^[2]

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1. Materials Science Division, Lawrence Berkeley Laboratory and Department of Nuclear Engineering, University of California, Berkeley, California 94720 (United States)
2. Condensed Matter and Analytical Sciences Division, Chemistry and Materials Science Department, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

The vapor pressures of the fullerenes C{sub 60} and C{sub 70} have been measured over the temperature range 400--600 {degree}C by the Knudsen-effusion thermogravimetric technique. For C{sub 60}, a heat of sublimation of 38{plus minus}1 kcal/mol is obtained, and the value for C{sub 70} is 45{plus minus}1 kcal/mol. The vapor pressure of C{sub 60} ranges from 1.8{times}10{sup {minus}5} and 1.4{times}10{sup {minus}2} Torr and that of C{sub 70} is between 1.4{times}10{sup {minus}5} and 8.7{times}10{sup {minus}3} Torr over the temperature range investigated. At 500 {degree}C, the vapor pressure of C{sub 60} is about 10{sup 35} that of graphite. The entropy of vaporization of C{sub 60} obeys Trouton's rule.

• DOE Contract Number: AC03-76SF00098; W-7405-ENG-48
• OSTI ID: 7070419
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 60:11; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
CARBON
CRYSTALS
ELEMENTS
ENTHALPY
ENTROPY
EVAPORATION
FULLERENES
KNUDSEN GAGES
MEASURING INSTRUMENTS
MOLECULAR CRYSTALS
NONMETALS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PRESSURE GAGES
SUBLIMATION HEAT
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
VACUUM GAGES
VAPOR PRESSURE