Multilayer relaxation of the Pd(320) surface

The structure of a Pd(320) [3(110) x (100)] surface has been determined by low energy electron diffraction (LEED). A model consistent with an unrecons tructed bulk truncated surface with relaxation of the first six interlayer spacings normal to the macroscopic (320) surface and local differential rel axation of step edge atoms has been considered. The changes in the first five interlayer spacings were found to be -15% (-0 .08 Angstrom), -9% (-0.05 Angstrom), -6% (-0.03 Angstrom), + 15% (+ 0.08 An gstrom) and + 6% (+ 0.03 Angstrom). (C) 2000 Elsevier Science B.V. All righ ts reserved.