Real time in situ energy dispersive X-ray powder diffraction
techniques have been developed using synchrotron radiation to monitor the
intercalation of a guest species into a solid host.
The time dependence of the extent of reaction alpha for the intercalation of inorganic and organometallic guests into a series of metal dichalcogenides (MX2; M = Zr, Sn, Nb, Ta, Ti; X = S, Se) and metal hexa-thiohypodiphosphates (MPS3; M = Mn and Cd) has been experimentally determined. A kinetic model has been developed which can be satisfactorily used to fit the rate data. The important factors which determine the kinetics are nucleation and two-dimensional radial diffusion.