8 Citations (Scopus)


A mixture of two isotopes of the same rare gas represents the extreme case of molecular simplicity. In this work, the excess molar Gibbs energies for liquid mixtures of (Ar-36 + Ar-40) have been measured for the first time, with unprecedented precision. Results show that the excess vapour pressure of an equimolar mixture is approximately 2.5 Pa in the 85-96 K temperature range. The results are well predicted by a modified version of the quantum theory of isotope effects in mixtures.
Original languageUnknown
Pages (from-to)1095-1097
JournalPhysical Chemistry Chemical Physics
Issue number5
Publication statusPublished - 1 Jan 2000

Cite this