An evaporation study of C-76 by Knudsen cell mass spectrometryстатья
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Аннотация:The vapour pressure of pure C-76 and its sublimation enthalpy have been determined by Knudsen cell mass spectrometry in the temperature range 637-911 K. The temperature-pressure equation is Inp(Pa) = (-22 806 +/- 820)/T(K) + (24.52 +/- 1.08). The mean sublimation enthalpy at 764 K is (190 +/- 7) kJ/mol. This value is lower than that, (222 +/- 17) kJ/mol, determined by us previously from a mixture of higher fullerenes,(1) confirming further that the mixture of higher fullerenes is not an ideal solid solution. (C) 1998 John Wiley & Sons, Ltd.