D.Yu. Borisova, A.A. Mavrin, L.N. Sidorov, E.V. Skokan, J.G. Edwards, F.M. Spiridonov, A.Ya. Borshchevsky and I.N. Ioffe
FULLERENE SCIENCE AND TECHNOLOGY, 6(3), pp.519-544, (1998)
ABSTRACT. Knudsen cell mass spectrometry and Knudsen-torsion effusion technique were used to study K/C60 binary system. Activities of potassium and/or C60 were measured in all heterogeneous regions of the K-C60 phase diagram and the Gibbs energies of formation of KxC60 (x=1.3.4.6) were calculated. Gaseous species KC60(g) was identified and the Gibbs energy of formation of KC60(g) was calculated directly from the experimental data.