抄録
The lattice constants of the palladium black and palladium supported on alumina-silica were measured by means of an X-ray diffraction with a newly designed sample holder.
Lattice constants for both α - and β -phases were obtained for the palladium black which contains hydrogen corresponding to the horizontal part of the sorption isotherm (Fig.2). On the other hand, neither the horizontal part of the sorption isotherm nor the X-ray diffraction peaks which are indicative of co-existance of the α - and β -phases were observed for the highly dispersed palladium (Fig.3).
It was also shown that the degree of the expansion of the lattice in the supported palladium was smaller than that in the palladium black.
