The process of normal hydrogen infusion into a C60 powder at 1bar and room temperature was monitored using X-ray diffraction. The effect of the intercalation on the lattice proved to be rather weak: the volume expansion upon complete saturation does not exceed 0.13%. The characteristic saturation time was found to be 320h; the corresponding diffusion coefficient amounted to 2.8 x 10-14cm2/s. The integrated reflection intensity calculations for completely saturated sample suggested that only octahedral voids were filled under the conditions of experiment. The effect of complete saturation on the rotational subsystem of the C60 fullerite was rather weak: the orientational phase transition shifts by 6 to 7K to lower temperatures; no essential hysteresis was noticeable. The dopant exhibited a reluctance to leave the sample under a vacuum of 10-3Torr at room temperature.

Process of Intercalation of C60 with Molecular Hydrogen from XRD Data. Yagotintsev, K.A., Stetsenko, Y.E., Legchenkova, I.V., Prokhvatilov, A.I., Strzhemechny, M.A., Schafler, E., Zehetbauer, M.: Fizika Nizkikh Temperatur, 2009, 35[3], 315-9