THERMODYNAMIC PROPERTIES OF A SINGLE-CRYSTAL OF FULLERENE C-60 - A DSC STUDY

A 3.89mg single crystal of fullerene C-60 was grown by sublimation and its thermodynamic properties were determined through DSC measurements . The transition temperature and enthalpy are the highest ones that we re ever measured (T-tr = (261.4+/-0.5)K and Delta(tr)H = (9.0+/-0.5)kJ mol(-1), respectively) and are thought to be near-standard ones. Howev er, it is shown that mechanical grinding smears out the DSC transition peak. Constraints which develop along free (111) surfaces are assumed to be responsible for this phenomenon.