Zur Kinetik der Bildung von Na2PdC2

On the Kinetics of the Formation of Na₂PdC₂ The kinetics of the formation of Na₂PdC₂ from Na₂C₂ and palladium were investigated by means of time‐resolved synchrotron powder diffraction (powder diffractometer at beamline B2, HASYLAB/Hamburg) at different temperatures in the range 513 to 533 K. By Rietveld analysis of the resulting diffraction patterns the molar ratio of Na₂PdC₂ was determined in dependence of the reaction time. The calculated crystallization curves were analysed by using the Avrami‐Erofe'ev model for the kinetics of solid‐state reactions. A diffusion mechanism was found and an activation energy of 480(120) KJ/mol was determined. Reasons for the low accuracy of this value are discussed.